Self-hosted WhatsApp API gateway that exposes WhatsApp sessions, messaging, and webhooks over a REST API with a web dashboard.
Open-source, self-hostable customer support platform combining live chat, email, and social channels into one inbox.
Official source code for the Telegram iOS messaging app, with build instructions for compiling it in Xcode.
Self-hosted, federated social network server implementing ActivityPub for publishing posts, media, and following users across servers.