Except for SVMLight which is (C) Torsten Joachims and follows a different licensing scheme (cf. LICENSE.SVMLight in the tar achive) SHOGUN is licensed under the GPL version 3 or any later version (cf. LICENSE).
If you use SHOGUN in your research you are kindly asked to cite the following paper:
|Soeren Sonnenburg, Gunnar Raetsch, Sebastian Henschel, Christian Widmer, Jonas Behr, Alexander Zien, Fabio de Bona, Alexander Binder, Christian Gehl, and Vojtech Franc. The SHOGUN Machine Learning Toolbox. Journal of Machine Learning Research, 11:1799-1802, June 2010.|