Mini vMac - The Mini vMac emulator collection allows modern computers to run software made for early Macintosh...
FCEUX - FCEUX is a Nintendo Entertainment System (NES), Famicom, and Famicom Disk System (FDS) emulator.
Basilisk II - Basilisk II is an Open Source 68k Macintosh emulator.
Nestopia - A portable and cycle-accurate NES emulator written in C++
Steem Engine - Steem is an open source Atari STE emulator for Windows and Linux.
RetroArch - RetroArch is a frontend for emulators, game engines and media players.