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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.

GameCopyWorld - An index for Game Backup Instructions, No CD Patches, and Game Trainers

GamePatchPlanet - GamePatchPlanet allows you to browse from a huge library of PC Cheat Codes, Tweaks, and Fixes, Trainers, Tools, Gaming news, Patches and download them for free.

Cheat Engine - Cheat Engine is an open source memory scanner/hex editor/debugger for Windows.

CheatbookDB - CheatbookDB is a highly rated source for finding Cheats, Tips, Hints, and Trainers for major video games.