jGameBase - jGameBase is a fully-featured retro-gaming emulator frontend and game database utility.
ePSXe - ePSXe (enhanced PSX emulator) is an emulator of the PlayStation video game console for x86-based PC...
Z26 - Z26 is one of the best emulators for the Atari 2600.
PPSSPP - PPSSPP is the leading PSP emulator for Android, Windows, Linux, Mac and more.
Javatari - Javatari is a multiplayer Atari 2600 emulator written in pure Java with no external libs.
RetroArch - RetroArch is a frontend for emulators, game engines and media players.