Kallithea is a cross-platform free software source code management system, the primary goal of which is to provide a repository hosting service with features for collaboration, such as forking, pull requests, code review, issue tracking etc.

Kallithea is a fork of RhodeCode, created after the original developer had changed the license terms.

According to Bradley M. Kuhn of Software Freedom Conservancy, this exception statement is ambiguous and "leaves the redistributor feeling unclear about their rights".

Kallithea supports hosting repositories of Mercurial and Git version control systems.

It can also be used to quickly exchange code snippets by means of a revision controlled pastebin ("gists").