Kallithea is open-source donationware under the Software Freedom Conservancy project that focuses on providing a customized, self-administered interface for Mercurial and Git repositories. It is built for speed and performance with a built-in push/pull server, full text search and code-review, and can be run as standalone hosted application on your own server.

The name of the project originates from Καλλιθέα, the name of a locality on the island of Rhodes, in Greece, which means ‘the best view’. In turn, the Kallithea project helps developers get the best views of their project and its contributions.