federation

Synapse is the reference homeserver implementation for Matrix, an open standard for secure, decentralized, real-time communication across different service providers.

Databag is a federated messenger for self-hosting that focuses on efficiency and minimal resource usage. It provides decentralized communication with end-to-end encryption, audio/video calls, and topic-based threading.

Forgejo is a lightweight software forge focused on scaling, federation, and privacy. As a community-driven fork of Gitea, it provides a comprehensive Git hosting platform with enhanced focus on user freedom, federation capabilities, and privacy protection for collaborative software development.