Also see the Modrinth Awesome list, and a (probably somewhat outdated) list of curse modpack downloaders at https://gist.github.com/jikuja/f44533a16ad04624c3eb8e99e7a3e494/
This list is a bit outdated in places, but I'm still adding things here so that I don't forget them.
| Name | Type | Number of mods/packs | Popularity (Similarweb rank) | Official launcher | Third-party support | Open Source backend | Author rewards |
|---|---|---|---|---|---|---|---|
| CurseForge | Public | 31,000 mods; 38,000 modpacks | #1410 | Yes | Many | No | Yes |
| Modrinth | Public | 2000 mods | #79,182 | In development | ATLauncher, packwiz, pacmc, modweaver | Yes | Planned |