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License Bureau

Copyleft and the GNU General Public License

What is Copyleft?
GNU General Public License
GNU Lesser General License
The Open Source Definition

*Academic Free License
*Apache Software License
*Apple Public Source License
*Artistic license
*Attribution Assurance Licenses
*BSD license
*Common Public License
*Eiffel Forum License
*Eiffel Forum License V2.0
*Entessa Public License
*Frameworx License
*GNU General Public License (GPL)
*GNU Library or "Lesser" General Public License (LGPL)
*Lucent Public License (Plan9)
*IBM Public License
*Intel Open Source License
*Historical Permission Notice and Disclaimer
*Jabber Open Source License
*MIT license
*MITRE Collaborative Virtual Workspace License (CVW License)
*Motosoto License
*Mozilla Public License 1.0 (MPL)
*Mozilla Public License 1.1 (MPL)
*Naumen Public License
*Nethack General Public License
*Nokia Open Source License
* OCLC Research Public License 2.0
*Open Group Test Suite License
*Open Software License
*PHP License
*Python license (CNRI Python License)
*Python Software Foundation License
*Qt Public License (QPL)
*RealNetworks Public Source License V1.0
*Reciprocal Public License
*Ricoh Source Code Public License
*Sleepycat License
*Sun Industry Standards Source License (SISSL)
*Sun Public License
*Sybase Open Watcom Public License 1.0
*University of Illinois/NCSA Open Source License
*Vovida Software License v. 1.0
*W3C License
*wxWindows Library License
*X.Net License
*Zope Public License
*zlib/libpng license