Internet Pinball Database
Killer List of Video Games
Mr. Pinball Classifieds:
The biggest classifieds dedicated to pinball and vintage gun games.
Arcade Flyer Database
Pinball Hall of Fame Flyer Reference
Pinball Rule Sheets
System16: Tons of techie info on Atari, Capcom, Irem, Konami, Midway, Namco, Sega, SNK and Taito videogames.
System 11: All things Williams/Bally for System 11 machines.