GitLab : GitLab is a web-based Git repository manager with wiki and issue tracking features. GitLab offers hosted accounts similar to GitHub, but also allows i...
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.
Radicale : The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.
Gerrit : Web based code review and project management for Git based projects.
Gitea is a community managed fork of Gogs, lightweight code hosting solution written in Go and published under the MIT license.