EMULATION

Zophar.Net My favorite place for emulators and hacking tools

Romhacking.Net My other favorite place for rom hacks (patches) and hack tools

The ISO Zone The world's finest retro gaming resource

ArcadePunks.Com Lots of collected packs for each console

CompleteRoms.Com A nice clean interface with a more
comprehensive list of individual games for every console

CoolRom.Com boasts being the largest resource on the net. also has emulators