Free 32/64/16-bit multi-platform Pascal and Object Pascal compiler
A cross-platform port of Hexen II game.
A promising chess program
The Fast Echomail Processor/tosser, for Fidonet Technology Networks
A 16 bit style game on the 16-bit IBM XT.
A minimalistic but complete standard Forth compiler in C
Tiny education compiler that can compile itself
Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..
Japheth's assembler, JWasm