Marathon is released under GNU LGPL license. A copy of license is available in both the source and binary distributions.
Marathon 2.0 contains two parts. The runtime and script models are released under GNU LGPL license. The core of Marathon is released under GNU GPL license.
You can find an online copy of the license at FSF website.
Please note that Marathon uses other open source packages which have their own licenses. The license details of these dependent packages are available in the distributions.
