RetroArch is a frontend for emulators, game engines and media players.
Emulator of x86-based machines based on PCem
An Open Source DOS emulator to run old DOS games
Simple and flexible programming language for applications development
Analyzes and adjusts the volume of MP3 files
A portable, multi-platform, command-line driven graphing utility
Dos2Unix / Unix2Dos - Text file format converters
Versatile Commodore Emulator
MS-DOS graphics library, though most things coded in portable C
locales configuration tool for DOS
a 16-bit midi player for DOS
an ethernet-based file system for DOS
Program for create MS-DOS disks images pre-formated
Agena is an interpreted procedural programming language.
an interactive "rolling paper" calculator
Logging Software for HAM's / Logbuchprogramm für Funkamateure
The Fast Echomail Processor/tosser, for Fidonet Technology Networks
Program and Game Manager for DOS
Open source BBS doors and utilities