GNU social : GNU social is a continuation of the StatusNet project. It is social communication software for both public and private communications. It is widely su...
librehosters : librehosters is a network of cooperation and solidarity that uses free software to encourage decentralisation through federation and distributed platf...
Faktory : Faktory is a language-agnostic, persistent background job system.
Gibber : Gibber is a live coding environment for the web browser, using the Gibberish.js audio engine, the CodeMirror code editor library and wrapping Three.js...
pump.io : Social server with an ActivityStreams API. It's a stream server that does most of what people really want from a social network.
Fireworq is a lightweight, high-performance, language-independent job queue system.
