The TrueTypeViewer, TTIComp, OTComp and OTLegacy all use my easy-to-handle, fast and safe OpenType font manipulation library. You may download the sources to all of those at once. The current version is 20030318. Building the tools requires the following:

• Visual C++ 6.0, which will build the applications straight away, and for which project and workspace files are provided, or gcc (version 3 works on cygwin and GNU/Linux). It should be possible to compile the sources on any other C++ compiler with decent template and STL support.
  
• The Qt library for the TrueTypeViewer. I use version 2.3 for Windows. Qt is an easy-to-use, cross-platform, object-oriented library downloadable from www.trolltech.com. Note again that the Qt library is only required for the TrueTypeViewer, as this is an application with a GUI. The other ones are console applications. Never mind the "Qt" project Visual C++ can't find when you open the TrueTypeViewer workspace; this does not matter at all.
• The relative paths should be as in the ZIP file. All applications refer to the OTFont library with #include "../OTFont/OpenTypeFile.h" so that has to work.

All of the programs are distributed under the GNU General Public License. I appreciate feedback (a guide to my email address). However, nowadays I am so busy doing other things that I'm unlikely to be able to act on it. The GPL allows you to redistribute changed versions, which may be an interesting option when you find problems.