Versatile Commodore Emulator
VICE is an emulator collection which emulates the C64, the C64-DTV, the C128, the VIC20, practically all PET models, the PLUS4 and the CBM-II (aka C610). It runs on Unix, MS-DOS, Win32, OS/2, Acorn RISC OS, BeOS, QNX 6.x, Amiga, GP2X or Mac OS X machines.
A promising chess program
A text based chess program with interface to XBoard and UCI protocol. For access to code, please clone the git repository. Version 0.2.x and 0.9.x are written in C. Version 0.3.x till 0.6.x are written in C++. Unfortunately, I never got the C++ version to compile properly on all platforms. So from version 0.9.0, the code is back to plain old CC.
Bible Concordance generator and viewer for UNIX/Linux/Cygwin, written in C. Supports multiple word searches using boolean operators and Reverse Polish notation. Unlike printed concordances, shows complete verse, and in context.
xbreaky a breakout game for X