has clause is compatible license of licence software license Source code available Number of installations unrestricted Number of users unrestricted Time for use unrestricted Usage unrestricted Derivatives allowed GNU GPL Compatible License Type GNU GPL v3 GNU GPL v2 Distribution with notices MIT License This is a lax, permissive non-copyleft free software license, compatible with the GNU GPL. It is sometimes ambiguously referred to as the MIT License. For substantial programs it is better to use the Apache 2.0 license since it blocks patent treachery. https://www.gnu.org/licenses/license-list.html, accessed 28 June 2016. Expat License