Tigase is an open source (AGPL3) project started by Artur Hefczyc in October 2004 to develop an XMPP server implementation in Java. Initially the goal was to develop a fully compliant XMPP server with backward compatibility with an informal XMPP specification. In time the project has been split into smaller parts - server implementation, XML tools containing a parser for XML streams and a test suite with a built-in scripting language.