A free, cross-platform emulator for GW-BASIC, PCjr & Tandy BASIC
ATasm is a 6502 command-line cross-assembler.
Atari 2600, C64, Python, 3D engines and rock'n roll
DOSBox fork for embedded devices
A multithreaded, test-driven electronics emulator for .net 4.0.
A low-power ISA design and simulator for a 2010 IEEE competition
Modular, agent-oriented and extendable agent toolkit.
z390 Portable Mainframe Assembler and Emulator
A Bash Front-End to FCE Ultra