GameCopyWorld - An index for Game Backup Instructions, No CD Patches, and Game Trainers
IGDB - An open video game database
Fling Trainer - Fling Trainer gives you the opportunity to download PC Game Cheats and Mods for many games without asking for any payment in return.
FreeToGame - Your digital game store where everything is free!
WeMod - Personalize your gaming experience Thousands of free mods and trainers for your favorite single-player PC games — all in one place.
The Visual Novel Database - VNDB.org strives to be a comprehensive database for information about visual novels.