has clause is compatible license of licence software license Source code available Usage unrestricted Derivatives allowed GNU GPL Compatible License Type GNU GPL v3 GNU GPL v2 Distribution with notices Modified BSD 3 clause BSD License Andy Jones The Modified BSD is a software license based on he original FreeBSD license, modified by removal of the advertising clause. It is a lax, permissive non-copyleft free software license, compatible with the GNU GPL. This license is sometimes referred to as the 3-clause BSD license. According to the GNU Project, the modified BSD license is not bad, as lax permissive licenses go, though the Apache 2.0 license is preferable. However, it is risky to recommend use of “the BSD license”, even for special cases such as small programs, because confusion could easily occur and lead to use of the flawed original BSD license. To avoid this risk, you can suggest the X11 license instead. The X11 license and the modified BSD license are more or less equivalent. According to the GNU project, the Apache 2.0 license is better for substantial programs, since it prevents patent treachery. Allyson Lister http://www.gnu.org/licenses/license-list.html, accessed June 12, 2013.