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✔️ == added to live website at fediverse.party

🎉 == projects that have successfully federated with this protocol

✒️ == newly added to this page (added, not altered. Only @light to remove please)

Note: Tools with open protocol issue (not yet implemented), not fully open sourced code, no documentation at all, or alpha state with development inactive for several months, not added for now.

List of projects that have an ActivityPub implementation or are committed to one

Note: Most of these projects include both a back-end and a web client, but this list can also include projects that are only a back-end. Projects that are only a web app, for use with an existing back-end, will go on the client watchlist .

Contents

Social networks, Microblog Apps

  • ✔️ Aardwolf (site): Facebook-like social network connecting communities across the web AGPL-3.0, Rust

  • ✔️ ActorsCafé: Microblogging server written in C# AGPL-3.0, C#

  • ✔️ Dolphin: Lightweight ActivityPub Server optimized for single-user. A fork and sister project of Misskey AGPL-3.0, Javascript

  • 🎉 ✔️ Epicyon (site): ActivityPub server implementing S2S and C2S protocols, suitable for single board computers. Includes features such as moderation tools, post expiry, content warnings, and image descriptions AGPL-3.0, Python

  • ✔️ FlockingBird (site, Fedi account): social network for professionals (WIP)

  • 🎉 ✔️ Friendica (site): Personal network that helps to keep in contact with friends. Interface and functionality include common features of a mainstream social network AGPL-3.0, PHP

  • ✔️ GNU social (site): Microblogging server with multiple plugins AGPL-3.0, PHP

  • 🎉 ✔️ groundpolis: A microblogging service forked from Misskey AGPL-3.0, Typescript

  • 🎉 ✔️ Honk (Fedi account): ActivityPub server with minimal setup and support costs ISC, Go

  • ✔️ Kanzaki: A Mastodon-compatible, ActivityPub-speaking server in OCaml AGPL-3.0, OCaml

  • ✔️ Kibou: Lightweight social networking server AGPL-3.0, Rust

  • 🎉 ✔️ Kroeg (site): Generic ActivityPub server, with a focus on microblogging style activities - , Rust

  • 🎉 ✔️ Mastodon (site): Epic microblogging network with many features and multiple interface layouts to choose from AGPL-3.0, Ruby

  • 🎉 ✔️ microblog.pub (site): Self-hosted, single-user, ActivityPub powered microblog. Like Pubgate, uses little-boxes AP library AGPL-3.0, Python

  • ✔️ microstatus: Lightweight Mastodon and GNU Social-compatible server implementation ISC, Rust

  • 🎉 ✔️ Misskey (site): Sophisticated microblogging with personality. Provides many additional features like calendar, emoji reactions, polls, games, and many other widgets AGPL-3.0, Javascript

  • ✒️ ✔️ Mistpark 2020 aka 'misty' (site, Fedi account) - A webserver app that supports AP and Zot protocols, fork of Zap CC0-like, PHP

  • 🎉 ✔️ Pleroma (site): Microblogging platform AGPL-3.0, Elixir

  • pump.io: still considers adding ActivityPub

  • ✔️ Rustodon: Mastodon-compatible server AGPL-3.0, Rust

  • ✒️ Scuttlebutt - currently working on a bridge between SSB and AP networks

  • 🎉 ✔️ Smithereen: VKontakte-like social network, with friends, walls, photo albums and groups Unlicense, Java

  • 🎉 ✔️ SocialHome (site): Personal webpage with social networking functionality AGPL-3.0, Python

  • 🎉 ✔️ Tavern (Fedi account): A minimalistic Activity Pub server. Think Mastodon, but smaller and with fewer features Go, MIT

  • 🎉 ✔️ Zap (site, Fedi account): A webserver app that supports AP and Zot protocols CC0-like, PHP

Blog, Publishing, and Reading Apps

  • ✒️ Diffu: an attempt at a federated Tumblr/ Medium, aimed at hosting long form articles that easily and neatly embed other kinds of content from any fediverse platform (microblog posts, PixelFed images, PeerTube videos etc). Proposed by a French company called Befox, who attempted to crowdfund development (inspired perhaps by the success or PeerTube and Mobilizon), but didn't hit their target.

  • ✔️ Distbin (site): Post bin Apache-2.0, Typescript

  • ✔️ Dokie.li (site): Article authoring and formating Apache-2.0, Javascript

  • ✔️ FediBlog (site): Fully customisable blog engine GPL-3.0, PHP

  • ✔️ 🎉 Bookwyrm (site): A federated alternative to Goodreads CC0-1.0, Python

  • ✔️ Readlebee ( Fedi account): An attempt to create a viable Goodreads alternative, book reading progress, lists, reviews, comments AGPL-3.0, Javascript

  • ✔️ Hubzilla (site): CMS with a range of groupware tools available as plug-ins MIT, PHP

  • Known: Still considers adding AP support

  • ✔️ Little Library: A digital give-a-book, take-a-book library for ebooks. -, Javascript (no license, see: issue)

  • ✔️ Nautilus: A standalone service to deliver posts from your own website to ActivityPub followers. Apache-2.0, PHP

  • ✒️ NoteIn: No commits since October 2018

  • ✒️ picopub: Created by the developer of Fontina as a "tiny, Mastodon-compatible blog"; no commits since February 2019

  • 🎉 ✔️ Plume (site): Blogging application AGPL-3.0, Rust

  • ✔️ Read.as (site): Reading app by the devs of WriteFreely AGPL-3.0, Go

  • ✔️ Redaktor: AP-powered CMS

  • ✔️ WordPress - listed as a project on the-federation.info. AP plug-in by @pfefferle@mastodon.social, that allows users on AP apps to follow WP blogs, and comment on them, from an AP app.

  • 🎉 ✔️ Write Freely (site): Blog software AGPL-3.0, Go

Link-sharing, Forum, and Group Apps

  • ✒️ Discourse - Forum software, still considers adding AP support

  • ✒️ Flarum: Experimental plugin for Flarum forum software by @squeevee

  • ✒️ FediQuest (site): A federated alternative to traditionally centralized question & answer platforms, such as Quora/StackOverflow. GPL-3.0, Go

  • 🎉 ✔️ Guppe (site): By @datatitian, adds "groups" support as group-type actors GPL-3.0, Javascript

  • ✔️ Lemmy: Link aggregator, by @LemmyDev AGPL-3.0, Rust

  • ✒️ Lobste.rs: Existing Reddit replacement adding AP support

  • ✔️ Littr.me (Fedi account): Link aggregator inspired by Reddit MIT, Go

  • ✒️ lotide: A federated forum / link aggregator. AGPL-3.0, Rust

  • ✔️ MoonTree: Link aggregator, a work in progress MIT, Typescript

  • ✒️ Pantheon: Platform for building communities, no commits since September 2019

  • ✔️ Smilodon: the server by Purism used in LibreOne, not the abandoned Tuxcraft server or Pylodon client; a complementary fork of Mastodon, focusing on opt-in public spaces AGPL-3.0, Ruby

Media-hosting Apps

  • ✔️ Anfora (site): (formerly Zinat) Image sharing AGPL-3.0, Python

  • 🎉 ✔️ FunkWhale (site): Music streaming AGPL-3.0, Python

  • ✒️ Marmota: Streaming service like Spotify, no commits since March 2019;

  • PeerPx: Social network for photographers (alternative to 500px / Flickr); no commits since October 2018

  • 🎉 ✔️ PeerTube (site): Video-hosting site using WebTorrent AGPL-3.0, Typescript

  • 🎉 ✔️ PixelFed (site): Image sharing AGPL-3.0, PHP

  • ✔️ Pubcast (site): Podcasting platform MPL-2.0, Go

  • snap.as: Photo sharing

Events and Meetups

  • 🎉 ✔️ Gancio (site): Shared agenda for local communities; demo site AGPL-3.0, Javascript

  • ✔️ Gath: Public events with no registration required, an instance connected with the friend.camp Mastodon instance is up at: http://events.friend.camp GPL-3.0, Javascript

  • GetTogether - Still considering adding AP support

  • ✔️ Mobilizon (site, Fedi account): Aims to be more than a Meetup clone AGPL-3.0, Elixir

Friendica (see above) has an events engine that federates events over AP and is looking to test interop with other AP events apps. NextCloud federated events are in the works but this may or may not be AP-compatible.

Files, Contacts, and Calendar Syncing Apps

Dataset exchanging

  • ✔️ OLKi (site, Fedi account): A self-hosted linguistic corpora exchange platform that aims to be a simple gateway to the Fediverse for scientific interaction AGPL-3.0, Python

Developer Tools

  • ✔️ ActivityPubMock: A mock ActivityPub server to use in testing code Apache-2.0, Javascript

  • ✔️ ActivityPHP (Fedi account): Library for AP in PHP MIT, PHP

  • ✔️ BridgyFed (site): Bridge to the IndieWeb CC-0, Python

  • ✔️ CommonsPub (site): A fork of Pleroma intended to provide a UX that supports economic transactions and coordination AGPL-3.0, Elixir

  • ✒️ Drupal plugin by @swentel

  • ✔️ Express ActivityPub: Reference implementation using Express.js MIT, Express

  • ✔️ feed2toot: Feed to Mastodon, using the Mastodon client<>server API, not AP MIT, Python

  • ✔️ astreams (Fedi account): "ActivityStreams 2.0 encoding/decoding for Go" for use with fediQuest AGPL-3.0, Go

  • ✔️ ForgeFed (formerly GitPub) (site, Fedi account): A set of extensions to AP for federation between code forges (Git hosting sites like GitLab, Gogs, Gitea etc) CC-1.0

  • ✒️ go-ap (Fedi account): Libraries for using ActivityPub in the Go language. MIT, Go

  • ✔️ go-fed: ActivityStreams & ActivityPub in golang BSD-3-clause, Go

  • ✔️ LitePub (site): A set of extensions to AP, being developed by devs from Pleroma and Mastodon

  • ✔️ p3k: A set of tools indie.web sites can use to support AP servers MIT, PHP

  • ✔️ ActivityPub-PHP (Fedi account): A PHP implementation of the ActivityPub protocol, used in Perotype plugin MIT, PHP

  • ✔️ pubgate: "Asyncronous Lightweight ActivityPub API based on little-boxes. Implements both the client-to-server API and the federated server-to-server API. Compatible with Mastodon, Pleroma and microblog.pub" BSD-3-clause, Python

  • Pubstrate: Experimental AP implementation written in GNU Guile, no commits since November 2017

  • ✔️ RSS-to-ActivityPub Converter: RSS to AP converter MIT, Javascript

  • Spritely: federated MUD (MultiUser Dungeon) game engine, coded in Racket, by Chris Webber of MediaGoblin fame.

  • tags.pub: AP implementation testing tool?

  • ✒️ XWiki (site, Fedi account): A text-based collaboration platform. Stared to implement AP support. The XWiki team are the creators of Cryptpad

Relays reference

Not yet Categorized

  • ✒️ Agora: Home page, developed by @spoggy@mstdn.fr , 'license?, js/node lithtml/webcomponents'

  • ✔️ CPub: a semantic web server, part of the openEngiadina project AGPL-3.0, Elixir

  • ✒️ Hash2Pub: A fully-decentralised relay for global hashtag federation. White paper. No source code available yet.

  • ✒️ Kepi (formerly Chapeau?): "daemon in Django". GPL-2.0, Python

  • ✒️ Life-Server: Homepage, "A decentralized personal data server inspired by MIT's Solid Project ... Since node-solid-server (NSS) is being deprecated in favor of inrupt/pod-server, this repo intends to be another compatible implementation", MIT, Nodejs

  • ✔️ PherePhone: "A server that reblogs all the statuses of certain actors". AGPL-3.0, Go

  • ✔️ SemApps (site): Software toolkit for easy deployment and configuration of semantic information systems. Apache-2.0, Javascript

  • ✔️ SkoHub (site): A novel approach for finding content on the web. SkoHub extends Knowledge Organization Systems (KOS) to create a publication / subscription infrastructure for Open Educational Resources. Apache-2.0, Javscript

  • ✒️ un chapeau: Server for the Mastodon protocol, implemented in Django. AGPl-3.0, Python

  • ✔️ RavenVale: federating GuildWars2 website -, Go

  • Learn Awesome: Open-source equivalent review aggregation site. Think GoodReads, but generalized to all learning resources organized by topics, formats and difficulty AGPL-3.0, Ruby

  • ✒️ castling.club (site, Fedi account): Challenge someone to a game of chess using toots. MIT, Typescript

Is it Alive?

Projects that seem dormant and may be dead, but may also be doing dev quietly in private, or have moved to a new code forge without leaving a forwarding address, etc. Any information that could help us clarify whether these projects are still alive would be much appreciated.

It's Dead, Jim

Projects that are officially abandoned by the maintainers or with no signs of life on their code repo or any other official channels for more than a year. Listed on this watchlist just in case anyone doesn't realize they're dead, and thinks we just didn't know about them. Also in case a project is orphaned, then reactivated by a new developer.

  • Acorde - federated social music platform. Almost a year has passed since the initial commit.

  • ActivityPub.jl - AP support in the Julia language by @Matt5sean3, no commits since August, 2018. Project is missing, presumed dead.

  • Calendar-social - was definitely planning to implement AP. Missing, presumed discontinued

  • CloutStream - proposed by @mwpdx as a federated replacement for LinkedIn. Both @cloutstream and @mwpdx Mastodon.social accounts appears to have been removed from the server, all the project tools appear to be down, or removed from the host.

  • FedEvent: A prototype for federating event information

  • Fontina - proposed as a photo-sharing social media network. GH repo has gone read-only, and now says "dead project".

  • GangGo - Seems to have settled on using Go-Fed for AP federation. Developer has suspended development for the foreseeable future.

  • Indienet - homepage - abandoned in favour of Tincan development.

  • Kitsune: early alpha; no commits since November 2018; homepage down

  • Numa - built on Ethereum blockchain but intended to federate with AP. No commits since April 2018. No reply on issue about AP compatibility testing from May 8. Homepage now a spam site.

  • Osada - Osada was a full featured social network application running under the ActivityPub protocol. It also communicated with and inter-operated with servers on the Zot6 network. Abandoned by the developers in March 2019 (Update: Recent activity Aug 2020, moved to Codeberg).

  • Places.pub: AP implementation testing tool?

  • Pylodon - Flask-based (Python) ActivityPub server , source code also on GitLab, no updates on either repo for about a year, nor on their Smilodon client app.

  • Quit.im - this was a photo-sharing web client for a GNU social server, rather than a completely separate app. It would become an AP implementation when the AP plug-in for GS is done, but it's been obsoleted by the release of PixelFed.

  • Smilodon (server by Tuxcraft) - abandoned by developer "I'm now working on Sminos and so this will probably be 100% abandoned. There's not much to salvage, its code is cancer." Sminos appears to have never got beyond the initial commits.

Sources

Aside from project homepages and issue trackers, and comments made on the fediverse, the SocialWG has a list of projects they hoped would implement ActivityPub and links to issues where it's discussed. Also, there is an implementation report on ActivityPub.rocks. @Mayel from Social.coop created a web spreadsheet of AP apps and their characteristics. More projects using AP are profiled on We Distribute by Sean Tilley and his team. There are boards for discussing a range of AP implementations on the SocialHub forum. Alternative.to has a list of AP servers and client apps. The ActivityPub tag on GH is also a way to discover projects experimenting with AP.