Content Manager

Content Manager (part of the AcTools project) replaces Assetto Corsa's stock launcher: it manages cars, tracks, and mods, offers a fast quick-drive flow, and integrates with Custom Shaders Patch (CSP) for the graphics and physics tweaks most of the AC community runs. It's the de-facto standard third-party launcher for Assetto Corsa.

The Lite version is free and covers the core launcher and content management features; a donation-based app key (through AssettoCorsa.club or Patreon) unlocks extra tools and early-access builds. Source is public on GitHub, though it isn't published under a standard OSS license.

With SimLauncher: SimLauncher users commonly point an Assetto Corsa profile at Content Manager instead of assettocorsa.exe as the launch target, so CSP and mod management still work as expected.