diff --git a/COPYING.txt b/COPYING.txt
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--- /dev/null
+++ b/COPYING.txt
@@ -0,0 +1,675 @@
+
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
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+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
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+  For example, if you distribute copies of such a program, whether
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+  Developers that use the GNU GPL protect your rights with two steps:
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+  The precise terms and conditions for copying, distribution and
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+
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+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/bsp.cpp b/bsp.cpp
index 2fda8b7d..b6e3d473 100644
--- a/bsp.cpp
+++ b/bsp.cpp
@@ -1,3 +1,11 @@
+//-----------------------------------------------------------------------------
+// Binary space partitioning tree, used to represent a volume in 3-space
+// bounded by a triangle mesh. These are used to compute Boolean operations
+// on meshes. These aren't used for anything relating to an SShell of
+// ratpoly surfaces.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 SBsp2 *SBsp2::Alloc(void) { return (SBsp2 *)AllocTemporary(sizeof(SBsp2)); }
diff --git a/clipboard.cpp b/clipboard.cpp
index 392fe7c2..0888d0e5 100644
--- a/clipboard.cpp
+++ b/clipboard.cpp
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// The clipboard that gets manipulated when the user selects Edit -> Cut,
+// Copy, Paste, etc.; may contain entities only, not constraints.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 void SolveSpace::Clipboard::Clear(void) {
diff --git a/confscreen.cpp b/confscreen.cpp
index a5ed6043..433a12c8 100644
--- a/confscreen.cpp
+++ b/confscreen.cpp
@@ -1,6 +1,8 @@
 //-----------------------------------------------------------------------------
 // For the configuration screen, setup items that are not specific to the
 // file being edited right now.
+//
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "solvespace.h"
 
diff --git a/constraint.cpp b/constraint.cpp
index 6b9bc8ed..321eb91f 100644
--- a/constraint.cpp
+++ b/constraint.cpp
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// Implementation of the Constraint menu, to create new constraints in
+// the sketch.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 char *Constraint::DescriptionString(void) {
diff --git a/constrainteq.cpp b/constrainteq.cpp
index c35529b7..c62c3507 100644
--- a/constrainteq.cpp
+++ b/constrainteq.cpp
@@ -1,3 +1,10 @@
+//-----------------------------------------------------------------------------
+// Given a constraint, generate one or more equations in our symbolic algebra
+// system to represent that constraint; also various geometric helper
+// functions for that.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 const hConstraint ConstraintBase::NO_CONSTRAINT = { 0 };
diff --git a/describescreen.cpp b/describescreen.cpp
index dcf6c513..f09570ef 100644
--- a/describescreen.cpp
+++ b/describescreen.cpp
@@ -1,6 +1,8 @@
 //-----------------------------------------------------------------------------
 // The screens when an entity is selected, that show some description of it--
 // endpoints of the lines, diameter of the circle, etc.
+//
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "solvespace.h"
 
diff --git a/draw.cpp b/draw.cpp
index 56e2ee8b..c9f4e05b 100644
--- a/draw.cpp
+++ b/draw.cpp
@@ -2,6 +2,8 @@
 // The root function to paint our graphics window, after setting up all the
 // views and such appropriately. Also contains all the stuff to manage the
 // selection.
+//
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "solvespace.h"
 
diff --git a/drawconstraint.cpp b/drawconstraint.cpp
index 57291dd0..9d713bde 100644
--- a/drawconstraint.cpp
+++ b/drawconstraint.cpp
@@ -1,3 +1,11 @@
+//-----------------------------------------------------------------------------
+// Given a constraint, draw a graphical and user-selectable representation
+// of that constraint on-screen. We can either draw with gl, or compute the
+// distance from a point (the location of the mouse pointer) to the lines
+// that we would have drawn, for selection.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 void Constraint::LineDrawOrGetDistance(Vector a, Vector b) {
diff --git a/drawentity.cpp b/drawentity.cpp
index 862d7d60..800a4919 100644
--- a/drawentity.cpp
+++ b/drawentity.cpp
@@ -1,3 +1,10 @@
+//-----------------------------------------------------------------------------
+// Draw a representation of an entity on-screen, in the case of curves up
+// to our chord tolerance, or return the distance from the user's mouse pointer
+// to the entity for selection.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 char *Entity::DescriptionString(void) {
diff --git a/dsc.h b/dsc.h
index 81833776..1520a80d 100644
--- a/dsc.h
+++ b/dsc.h
@@ -1,4 +1,9 @@
-
+//-----------------------------------------------------------------------------
+// Data structures used frequently in the program, various kinds of vectors
+// (of real numbers, not symbolic algebra stuff) and our templated lists.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #ifndef __DSC_H
 #define __DSC_H
 
diff --git a/entity.cpp b/entity.cpp
index a54647b0..87a0f506 100644
--- a/entity.cpp
+++ b/entity.cpp
@@ -1,3 +1,10 @@
+//-----------------------------------------------------------------------------
+// The implementation of our entities in the symbolic algebra system, methods
+// to return a symbolic representation of the entity (line by its endpoints,
+// circle by center and radius, etc.).
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 const hEntity  EntityBase::FREE_IN_3D = { 0 };
diff --git a/export.cpp b/export.cpp
index 5a390888..974190de 100644
--- a/export.cpp
+++ b/export.cpp
@@ -3,6 +3,8 @@
 // format: getting the appropriate lines and curves, performing hidden line
 // removal, calculating bounding boxes, and so on. Also raster and triangle
 // mesh output.
+//
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "solvespace.h"
 #include <png.h>
diff --git a/exportstep.cpp b/exportstep.cpp
index 7c44acba..ddc59d66 100644
--- a/exportstep.cpp
+++ b/exportstep.cpp
@@ -1,3 +1,8 @@
+//-----------------------------------------------------------------------------
+// Export a STEP file describing our ratpoly shell.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 void StepFileWriter::WriteHeader(void) {
diff --git a/exportvector.cpp b/exportvector.cpp
index a9934f2a..15d9254f 100644
--- a/exportvector.cpp
+++ b/exportvector.cpp
@@ -1,5 +1,7 @@
 //-----------------------------------------------------------------------------
 // The file format-specific stuff for all of the 2d vector output formats.
+//
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "solvespace.h"
 
diff --git a/exposed/CDemo.c b/exposed/CDemo.c
index fba7f4f9..4bf3b37a 100644
--- a/exposed/CDemo.c
+++ b/exposed/CDemo.c
@@ -3,12 +3,7 @@
 // initial guesses for their positions, and then constrain them. The solver
 // calculates their new positions, in order to satisfy the constraints.
 //
-// This code is provided for evaluation purposes only. To purchase a license,
-// please visit:
-//
-//     http://solvespace.com/
-//
-// Copyright 2009-2010 Useful Subset, LLC
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include <windows.h>
 #include <stdio.h>
diff --git a/exposed/DOC.txt b/exposed/DOC.txt
index 90d73d25..5b049509 100644
--- a/exposed/DOC.txt
+++ b/exposed/DOC.txt
@@ -459,5 +459,5 @@ Windows-based developement tools. Examples are provided:
     in VB.NET       - VbDemo.vb
 
 
-Copyright 2009-2011 Useful Subset, LLC
+Copyright 2009-2013 Jonathan Westhues.
 
diff --git a/exposed/VbDemo.vb b/exposed/VbDemo.vb
index a5b2911c..01eafc73 100644
--- a/exposed/VbDemo.vb
+++ b/exposed/VbDemo.vb
@@ -9,12 +9,7 @@
 ' functions that you may wish to use a starting point in your own
 ' application.
 '
-' This code is provided for evaluation purposes only. To purchase a license,
-' please visit:
-'
-'     http://solvespace.com/
-'
-' Copyright 2009-2011 Useful Subset, LLC
+' Copyright 2008-2013 Jonathan Westhues.
 '-----------------------------------------------------------------------------
 
 Imports System.Runtime.InteropServices
diff --git a/exposed/lib.cpp b/exposed/lib.cpp
index 3e462716..2b5b9445 100644
--- a/exposed/lib.cpp
+++ b/exposed/lib.cpp
@@ -63,17 +63,6 @@ void Slvs_MakeQuaternion(double ux, double uy, double uz,
 void Slvs_Solve(Slvs_System *ssys, Slvs_hGroup shg)
 {
     if(!IsInit) {
-#if 1
-        dbp("SolveSpace library initialized (evaluation version only).");
-        dbp("Built " __DATE__ " " __TIME__
-                    ". Copyright 2009-2013 Useful Subset, LLC.");
-        HWND h = GetForegroundWindow();
-        MessageBox(h,
-"This is an evaluation copy of SolveSpace. To purchase a license, please "
-"contact info@solvespace.com.\r\n\r\n"
-"Copyright 2009-2013 Useful Subset, LLC.",
-            "SolveSpace", MB_OK);
-#endif
         InitHeaps();
         IsInit = 1;
     }
diff --git a/exposed/slvs.h b/exposed/slvs.h
index d113c034..1369134e 100644
--- a/exposed/slvs.h
+++ b/exposed/slvs.h
@@ -4,12 +4,7 @@
 // See the comments in this file, the accompanying sample code that uses
 // this library, and the accompanying documentation (DOC.txt).
 //
-// This code is provided for evaluation purposes only. To purchase a license,
-// please visit:
-//
-//     http://solvespace.com/
-//
-// Copyright 2009-2011 Useful Subset, LLC
+// Copyright 2009-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 
 #ifndef __SLVS_H
diff --git a/expr.cpp b/expr.cpp
index fe9df8e6..5e332a1b 100644
--- a/expr.cpp
+++ b/expr.cpp
@@ -1,3 +1,11 @@
+//-----------------------------------------------------------------------------
+// The symbolic algebra system used to write our constraint equations;
+// routines to build expressions in software or from a user-provided string,
+// and to compute the partial derivatives that we'll use when write our
+// Jacobian matrix.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 ExprVector ExprVector::From(Expr *x, Expr *y, Expr *z) {
diff --git a/expr.h b/expr.h
index 6e4564bb..84ae8e9e 100644
--- a/expr.h
+++ b/expr.h
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// An expression in our symbolic algebra system, used to write, linearize,
+// and solve our constraint equations.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 
 #ifndef __EXPR_H
 #define __EXPR_H
diff --git a/file.cpp b/file.cpp
index 80fa724b..e9221b18 100644
--- a/file.cpp
+++ b/file.cpp
@@ -1,3 +1,8 @@
+//-----------------------------------------------------------------------------
+// Routines to write and read our .slvs file format.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 #define VERSION_STRING "±²³SolveSpaceREVa"
diff --git a/generate.cpp b/generate.cpp
index 1f01bff5..815df5ec 100644
--- a/generate.cpp
+++ b/generate.cpp
@@ -1,3 +1,11 @@
+//-----------------------------------------------------------------------------
+// Generate our model based on its parametric description, by solving each
+// sketch, generating surfaces from the resulting entities, performing any
+// requested surface operations (e.g. Booleans) with our model so far, and
+// then repeating this process for each subsequent group.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 void SolveSpace::MarkGroupDirtyByEntity(hEntity he) {
diff --git a/glhelper.cpp b/glhelper.cpp
index 7e15ea1c..f7fc6c10 100644
--- a/glhelper.cpp
+++ b/glhelper.cpp
@@ -1,3 +1,8 @@
+//-----------------------------------------------------------------------------
+// Helper functions that ultimately draw stuff with gl.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 // A public-domain Hershey vector font ("Simplex").
diff --git a/graphicswin.cpp b/graphicswin.cpp
index db18d37a..f38f7bd3 100644
--- a/graphicswin.cpp
+++ b/graphicswin.cpp
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// Top-level implementation of the program's main window, in which a graphical
+// representation of the model is drawn and edited by the user.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 #define mView (&GraphicsWindow::MenuView)
diff --git a/group.cpp b/group.cpp
index 2efd5b06..9fc16fa0 100644
--- a/group.cpp
+++ b/group.cpp
@@ -1,3 +1,11 @@
+//-----------------------------------------------------------------------------
+// Implementation of the Group class, which represents a set of entities and
+// constraints that are solved together, in some cases followed by another
+// operation, like to extrude surfaces from the entities or to step and
+// repeat them parametrically.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 const hParam   Param::NO_PARAM = { 0 };
diff --git a/groupmesh.cpp b/groupmesh.cpp
index f2df6e64..1396b2b9 100644
--- a/groupmesh.cpp
+++ b/groupmesh.cpp
@@ -1,3 +1,10 @@
+//-----------------------------------------------------------------------------
+// Routines to generate our watertight brep shells from the operations
+// and entities specified by the user in each group; templated to work either
+// on an SShell of ratpoly surfaces or on an SMesh of triangles.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 #define gs (SS.GW.gs)
diff --git a/mesh.cpp b/mesh.cpp
index f65f2fd0..d8450fce 100644
--- a/mesh.cpp
+++ b/mesh.cpp
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// Operations on triangle meshes, like our mesh Booleans using the BSP, and
+// the stuff to check for watertightness.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 void SMesh::Clear(void) {
diff --git a/modify.cpp b/modify.cpp
index 31cf8818..0e8fcf67 100644
--- a/modify.cpp
+++ b/modify.cpp
@@ -1,3 +1,10 @@
+//-----------------------------------------------------------------------------
+// User-initiated (not parametric) operations to modify our sketch, by
+// changing the requests, like to round a corner or split curves where they
+// intersect.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 //-----------------------------------------------------------------------------
diff --git a/mouse.cpp b/mouse.cpp
index f3e9df4c..ba9f398e 100644
--- a/mouse.cpp
+++ b/mouse.cpp
@@ -1,5 +1,7 @@
 //-----------------------------------------------------------------------------
 // Anything relating to mouse, keyboard, or 6-DOF mouse input.
+//
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "solvespace.h"
 
diff --git a/polygon.cpp b/polygon.cpp
index 98cae6c0..46727f00 100644
--- a/polygon.cpp
+++ b/polygon.cpp
@@ -1,3 +1,8 @@
+//-----------------------------------------------------------------------------
+// Operations on polygons (planar, of line segment edges).
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 Vector STriangle::Normal(void) {
diff --git a/polygon.h b/polygon.h
index e447d060..dc9a77cf 100644
--- a/polygon.h
+++ b/polygon.h
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// Anything relating to plane polygons and triangles, and (generally, non-
+// planar) meshes thereof.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 
 #ifndef __POLYGON_H
 #define __POLYGON_H
diff --git a/request.cpp b/request.cpp
index f18a4f90..daae57b6 100644
--- a/request.cpp
+++ b/request.cpp
@@ -1,3 +1,11 @@
+//-----------------------------------------------------------------------------
+// Implementation of our Request class; a request is a user-created thing
+// that will generate an entity (line, curve) when the sketch is generated,
+// in the same way that other entities are generated automatically, like
+// by an extrude or a step and repeat.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 const hRequest Request::HREQUEST_REFERENCE_XY = { 1 };
diff --git a/sketch.h b/sketch.h
index 2b7d438e..188ecbb3 100644
--- a/sketch.h
+++ b/sketch.h
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// The parametric structure of our sketch, in multiple groups, that generate
+// geometric entities and surfaces.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 
 #ifndef __SKETCH_H
 #define __SKETCH_H
diff --git a/solvespace.cpp b/solvespace.cpp
index 16afc250..cae3c31f 100644
--- a/solvespace.cpp
+++ b/solvespace.cpp
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// Entry point in to the program, our registry-stored settings and top-level
+// housekeeping when we open, save, and create new files.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 SolveSpace SS;
@@ -718,10 +724,10 @@ void SolveSpace::MenuHelp(int id) {
             break;
         
         case GraphicsWindow::MNU_ABOUT:
-            Message("This is SolveSpace version 1.9.\n\n"
+            Message("This is SolveSpace version 2.0.\n\n"
                 "For more information, see http://solvespace.com/\n\n"
                 "Built " __TIME__ " " __DATE__ ".\n\n"
-                "Copyright 2008-2012 Useful Subset, LLC.\n"
+                "Copyright 2008-2013 Jonathan Westhues.\n"
                 "All Rights Reserved.");
             break;
 
diff --git a/solvespace.h b/solvespace.h
index 1f4aed05..068177c7 100644
--- a/solvespace.h
+++ b/solvespace.h
@@ -1,3 +1,8 @@
+//-----------------------------------------------------------------------------
+// All declarations not grouped specially elsewhere.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 
 #ifndef __SOLVESPACE_H
 #define __SOLVESPACE_H
diff --git a/srf/boolean.cpp b/srf/boolean.cpp
index d1d4706f..f43b9446 100644
--- a/srf/boolean.cpp
+++ b/srf/boolean.cpp
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// Top-level functions to compute the Boolean union or difference between
+// two shells of rational polynomial surfaces.
+// 
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 int I, N, FLAG;
diff --git a/srf/curve.cpp b/srf/curve.cpp
index d77fdf73..551ef969 100644
--- a/srf/curve.cpp
+++ b/srf/curve.cpp
@@ -1,6 +1,8 @@
 //-----------------------------------------------------------------------------
 // Anything involving curves and sets of curves (except for the real math,
 // which is in ratpoly.cpp).
+//
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "../solvespace.h"
 
diff --git a/srf/merge.cpp b/srf/merge.cpp
index 0a37e893..eacd6d64 100644
--- a/srf/merge.cpp
+++ b/srf/merge.cpp
@@ -1,6 +1,8 @@
 //-----------------------------------------------------------------------------
 // Routines to merge multiple coincident surfaces (each with their own trim
 // curves) into a single surface, with all of the trim curves.
+//
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "../solvespace.h"
 
diff --git a/srf/ratpoly.cpp b/srf/ratpoly.cpp
index 51839a66..578b2059 100644
--- a/srf/ratpoly.cpp
+++ b/srf/ratpoly.cpp
@@ -2,6 +2,8 @@
 // Math on rational polynomial surfaces and curves, typically in Bezier
 // form. Evaluate, root-find (by Newton's methods), evaluate derivatives,
 // and so on.
+//
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "../solvespace.h"
 
diff --git a/srf/raycast.cpp b/srf/raycast.cpp
index 73610d66..aa85b198 100644
--- a/srf/raycast.cpp
+++ b/srf/raycast.cpp
@@ -4,6 +4,8 @@
 // shell testing, and the intersection of edge line segments against surfaces
 // is used to get rough surface-curve intersections, which are later refined
 // numerically.
+//
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "solvespace.h"
 
diff --git a/srf/surface.cpp b/srf/surface.cpp
index 79de4949..92bbe9dd 100644
--- a/srf/surface.cpp
+++ b/srf/surface.cpp
@@ -1,6 +1,8 @@
 //-----------------------------------------------------------------------------
 // Anything involving surfaces and sets of surfaces (i.e., shells); except
 // for the real math, which is in ratpoly.cpp.
+//
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "../solvespace.h"
 
diff --git a/srf/surface.h b/srf/surface.h
index a78c3c11..f2854d5a 100644
--- a/srf/surface.h
+++ b/srf/surface.h
@@ -1,3 +1,11 @@
+//-----------------------------------------------------------------------------
+// Functions relating to rational polynomial surfaces, which are trimmed by
+// curves (either rational polynomial curves, or piecewise linear
+// approximations to curves of intersection that can't be represented
+// exactly in ratpoly form), and assembled into watertight shells.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 
 #ifndef __SURFACE_H
 #define __SURFACE_H
diff --git a/srf/surfinter.cpp b/srf/surfinter.cpp
index 7fd49d7a..171b7ec9 100644
--- a/srf/surfinter.cpp
+++ b/srf/surfinter.cpp
@@ -2,6 +2,8 @@
 // How to intersect two surfaces, to get some type of curve. This is either
 // an exact special case (e.g., two planes to make a line), or a numerical
 // thing.
+//
+// Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "solvespace.h"
 
diff --git a/srf/triangulate.cpp b/srf/triangulate.cpp
index e5c3dd3b..30e5881e 100644
--- a/srf/triangulate.cpp
+++ b/srf/triangulate.cpp
@@ -1,3 +1,11 @@
+//-----------------------------------------------------------------------------
+// Triangulate a surface. If the surface is curved, then we first superimpose
+// a grid of quads, with spacing to achieve our chord tolerance. We then
+// proceed by ear-clipping; the resulting mesh should be watertight and not
+// awful numerically, but has no special properties (Delaunay, etc.).
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "../solvespace.h"
 
 void SPolygon::UvTriangulateInto(SMesh *m, SSurface *srf) {
diff --git a/style.cpp b/style.cpp
index e1b62dad..cb86cb06 100644
--- a/style.cpp
+++ b/style.cpp
@@ -1,3 +1,10 @@
+//-----------------------------------------------------------------------------
+// Implementation of a cosmetic line style, which determines the color and
+// other appearance of a line or curve on-screen and in exported files. Some
+// styles are predefined, and others can be created by the user.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 #include <png.h>
 
diff --git a/system.cpp b/system.cpp
index a9fa3c5f..8b38f665 100644
--- a/system.cpp
+++ b/system.cpp
@@ -1,3 +1,11 @@
+//-----------------------------------------------------------------------------
+// Once we've written our constraint equations in the symbolic algebra system,
+// these routines linearize them, and solve by a modified Newton's method.
+// This also contains the routines to detect non-convergence or inconsistency,
+// and report diagnostics to the user.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 // This tolerance is used to determine whether two (linearized) constraints
diff --git a/textscreens.cpp b/textscreens.cpp
index fb0382f4..8527b1f4 100644
--- a/textscreens.cpp
+++ b/textscreens.cpp
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// The text-based browser window, used to view the structure of the model by
+// groups and for other similar purposes.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 //-----------------------------------------------------------------------------
diff --git a/textwin.cpp b/textwin.cpp
index 36b63a7d..b3cd5110 100644
--- a/textwin.cpp
+++ b/textwin.cpp
@@ -1,3 +1,8 @@
+//-----------------------------------------------------------------------------
+// Helper functions for the text-based browser window.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 #include "obj/icons-proto.h"
 #include <stdarg.h>
diff --git a/toolbar.cpp b/toolbar.cpp
index c8eef045..088e50b5 100644
--- a/toolbar.cpp
+++ b/toolbar.cpp
@@ -1,3 +1,10 @@
+//-----------------------------------------------------------------------------
+// The toolbar that appears at the top left of the graphics window, where the
+// user can select icons with the mouse, to perform operations equivalent to
+// selecting a menu item or using a keyboard shortcut.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 #include "obj/icons.h"
 
diff --git a/ttf.cpp b/ttf.cpp
index a41db7bf..4c5060d4 100644
--- a/ttf.cpp
+++ b/ttf.cpp
@@ -1,3 +1,10 @@
+//-----------------------------------------------------------------------------
+// Routines to read a TrueType font as vector outlines, and generate them
+// as entities, since they're always representable as either lines or
+// quadratic Bezier curves.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 //-----------------------------------------------------------------------------
diff --git a/ui.h b/ui.h
index 3811bf47..a4274d07 100644
--- a/ui.h
+++ b/ui.h
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// Declarations relating to our user interface, in both the graphics and
+// text browser window.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 
 #ifndef __UI_H
 #define __UI_H
diff --git a/undoredo.cpp b/undoredo.cpp
index bd30a4b8..7ce1b6b5 100644
--- a/undoredo.cpp
+++ b/undoredo.cpp
@@ -1,3 +1,10 @@
+//-----------------------------------------------------------------------------
+// The user-visible undo/redo operation; whenever they change something, we
+// record our state and push it on a stack, and we pop the stack when they
+// select undo.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 void SolveSpace::UndoRemember(void) {
diff --git a/util.cpp b/util.cpp
index d1bcbdb3..1a7ea584 100644
--- a/util.cpp
+++ b/util.cpp
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// Utility functions, mostly various kinds of vector math (working on real
+// numbers, not working on quantities in the symbolic algebra system).
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 void MakePathRelative(char *basep, char *pathp)
diff --git a/view.cpp b/view.cpp
index a5cac4b2..58d96c28 100644
--- a/view.cpp
+++ b/view.cpp
@@ -1,3 +1,9 @@
+//-----------------------------------------------------------------------------
+// The View menu, stuff to snap to certain special vews of the model, and to
+// display our current view of the model to the user.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include "solvespace.h"
 
 void TextWindow::ShowEditView(void) {
diff --git a/win32/manifest.xml b/win32/manifest.xml
index a6deeb27..f27a236e 100644
--- a/win32/manifest.xml
+++ b/win32/manifest.xml
@@ -3,7 +3,7 @@
 <assemblyIdentity
     version="1.0.0.0"
     processorArchitecture="X86"
-    name="UsefulSubsetLlc.3dCAD.MechSketch"
+    name="JonathanWesthues.3dCAD.SolveSpace"
     type="win32"
 />
 <description>Parametric 3d CAD tool.</description>
diff --git a/win32/w32main.cpp b/win32/w32main.cpp
index 5ce9da43..5d34e63c 100644
--- a/win32/w32main.cpp
+++ b/win32/w32main.cpp
@@ -1,3 +1,10 @@
+//-----------------------------------------------------------------------------
+// Our WinMain() functions, and Win32-specific stuff to set up our windows
+// and otherwise handle our interface to the operating system. Everything
+// outside win32/... should be standard C++ and gl.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include <windows.h>
 #include <shellapi.h>
 #include <commctrl.h>
diff --git a/win32/w32util.cpp b/win32/w32util.cpp
index ca4559cd..149eab68 100644
--- a/win32/w32util.cpp
+++ b/win32/w32util.cpp
@@ -1,3 +1,11 @@
+//-----------------------------------------------------------------------------
+// Utility functions that depend on Win32. Notably, our memory allocation;
+// we use two separate allocators, one for long-lived stuff and one for
+// stuff that gets freed after every regeneration of the model, to save us
+// the trouble of freeing the latter explicitly.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
 #include <windows.h>
 #include <stdarg.h>
 #include <string.h>