* [Mastodon v4.4.18](https://github.com/mastodon/mastodon) – Self-hosted social network server based on ActivityPub for microblogging and community engagement.

* [Hollo 0.9.2](https://github.com/fedify-dev/hollo) – Federated single-user microblogging software implementing Mastodon-compatible APIs for ActivityPub federation.

* [Misskey 2026.5.2](https://github.com/misskey-dev/misskey) – Federated social media platform with open source and free usage.