RetroAchievements.org's repositories
RALibretro
RALibretro is a multi-emulator used to develop RetroAchievements.
RAIntegration
The DLL responsible to integrate emulators with RetroAchievements.org
docs-archive
RADocs
RAProject64
N64 emulator with RetroAchievements support (modified version of Project64)
RAInterface
Enables RetroAchievements enabled emulators to interact with the server via the RA_Integration.dll
userscripts
Officially maintained userscripts