MT4j is open source and released under GPL License.

MT4j - Latest release

MT4j version 0.9 full release, including binaries, examples, sources and javadocs (17.1 MB, released Feb. 24th 2010)	Download
MT4j version 0.9 binary release (10.8 MB, released Feb. 24th 2010)	Download

• Get the latest Source Code from SVN

• View Change Log

• Installation Instructions

• How to Run MT4j Examples

MT4j - older releases

MT4j version 0.81 RC full release, including binaries, examples, sources and javadocs (16.7 MB, released Sep. 5th 2009)	Download
MT4j version 0.81 RC binary release (10.1 MB, released Sep. 5th 2009)	Download