ClassicGaming.com
- Large collection of ROM Images, and emulators for classic systems.
- http://www.classicgaming.com/vault/
The Dump - Rated, working ROMs for Neo Geo, Genesis and TurboGrafx-16. - http://thedump.classicgaming.gamespy.com/
PDRoms - ROM Images of console and arcade software released to the public domain. - http://www.pdroms.de/
ENES - An european dump group whose goal is to save, numerize and immortalize NES games currently out of sight, which are called undumped games. - http://enes.emunova.net/
Dave's Emu - Public Domain ROM Images for some systems. - http://www.davesemu.com
Demo Roms - A nice collection of Technical Demos (some with source code) for various systems. - http://www.emucamp.com/demoroms/
RomCenter - Managing tool for various systems with built-in zip function. - http://www.romcenter.com/