The fediverse is made by and for the people who use it. This is a not-comprehensive and lightly opinionated list of actively maintained, multi-user ActivityPub/fediverse software, and you can help.
Projects that feature assymetric relationships, flat feeds, and discovery through sharing.
| Project | Language | Repo | In development since |
|---|---|---|---|
| Bonfire | Elixir | https://github.com/bonfire-networks/bonfire-app | February, 2021? |
| GoToSocial | Golang | https://github.com/superseriousbusiness/gotosocial | February, 2021 |
| Letterbook | C# | https://github.com/Letterbook/Letterbook | June, 2023 |
| IceShrimp | C# | https://iceshrimp.dev/iceshrimp/Iceshrimp.NET | December, 2023 |
| Sharkey | Typescript | https://activitypub.software/TransFem-org/Sharkey | October, 2023 |
| Misskey | Typescript | https://github.com/misskey-dev/misskey | December, 2016 |
| Akkoma | Elixir | https://akkoma.dev/AkkomaGang/akkoma | January, 2017? |
| Hometown | Ruby | https://github.com/hometown-fork/hometown | August, 2019 |
Forums, link aggregators, bulletin boards, and similar topic-oriented projects
| Project | Language | Repo | In development since |
|---|---|---|---|
| NodeBB | Javascript | https://github.com/NodeBB/NodeBB | |
| Discourse (plugin) | Ruby | https://github.com/discourse/discourse-activity-pub | |
| Lemmy | Rust | https://github.com/LemmyNet/lemmy | February, 2019 |
| MBin | PHP | https://github.com/MbinOrg/mbin | |
| Piefed | Python | https://codeberg.org/rimu/pyfedi | July, 2023 |
Long form blogging platforms
| Project | Language | Repo |
|---|---|---|
| Write Freely | Golang | https://github.com/writefreely/writefreely |
| Wordpress (plugin) | PHP | https://github.com/automattic/wordpress-activitypub |
Media-oriented projects, like photo blogs, image boards, podcasting, or streaming video
| Project | Language | Repo | In development since |
|---|---|---|---|
| Pixelfed | PHP | https://github.com/pixelfed/pixelfed | ? |
| Owncast | Golang | https://github.com/owncast/owncast | ? |
| Peertube | Typescript | https://github.com/Chocobozzz/PeerTube | ? |
| Castopod | PHP | https://code.castopod.org/adaures/castopod | ? |
| Bandwagon | GoLang | https://github.com/EmissarySocial/bandwagon | June 2024? |
Projects that emphasize group spaces and mutual relationships
| Project | Language | Repo | In development since |
|---|---|---|---|
| Ocelot-Social | Typescript | https://github.com/Ocelot-Social-Community/Ocelot-Social | November, 2017 |
| Friendica | PHP | https://github.com/friendica/friendica | March, 2010 |
| Hubzilla | PHP | https://framagit.org/hubzilla/core | May, 2012 |
| (streams) | PHP | https://codeberg.org/streams/streams | 2021 |
| Forte | PHP | https://codeberg.org/fortified/forte | August, 2024 |
Generic servers, libraries, and other reusable resources which aren't actually apps
| Project | Language | Repo | In development since |
|---|---|---|---|
| ActivityPubSharp | C# | https://github.com/warriordog/ActivityPubSharp | November, 2022 |
| go-ap | Golang | https://github.com/go-ap | September, 2017 |
| Fedify | Typescript | https://github.com/dahlia/fedify | February, 2024 |
| Emissary | Golang | https://github.com/EmissarySocial/emissary | April, 2020? |
| Django ActivityPub ToolKit | Python | https://codeberg.org/mushroomlabs/django-activitypub-toolkit | January, 2025 |
+1 for PieFed. Also Discourse might be better grouped under Forums.