XTT 2.0.6: RSB 0.6 compatibility and available from Maven
XTT 2.0.6 has been released last week and is now made available through Maven (see Using XTT for installation instructions). The only major functional difference in this version is that it uses RSB 0.6, instead of 0.5. As RSB 0.6 sports a number of improvements, and is mostly backwards compatible in the API, this update is recommended for RSB users.
XCF users might be interested in the Maven support, which now makes adding XTT to your project a breeze. Check out the using xtt through Maven section