GDLauncher

GDLauncher is a free, open-source launcher for modded Minecraft.

Rewrite and Overwolf/CurseForge partnership
'GDLauncher Carbon' is a rewrite of GDLauncher made out of a partnership with Overwolf and CurseForge that adds advertisements to fund the launcher and support content creators on CurseForge. https://gdlauncher.com/en/blog/curseforge-partnership-announcement/