RetroArch is a frontend for emulators, game engines and media players.
Versatile Commodore Emulator
multi-platform cross assembler for 6502/6510/65816 cpu
Agena is an interpreted procedural programming language.
A cross-platform port of Hexen II game.
Analyzes and adjusts the volume of MP3 files
A portable, multi-platform, command-line driven graphing utility
EMX compiler hosted on Win32
Open source BBS doors and utilities
Dos2Unix / Unix2Dos - Text file format converters
A Forth compiler with a little difference
an ethernet-based file system for DOS
Plays iMelody (IMY) files using many sound systems
A minimalistic but complete standard Forth compiler in C