| License | Number | 
| GNU General Public License (GPL)  | 35807 | 
| GNU Library or Lesser General Public License (LGPL)  | 5447 | 
| BSD License  | 3587 | 
| Artistic License  | 1119 | 
| Apache Software License  | 905 | 
| MIT License  | 881 | 
| Mozilla Public License 1.1 (MPL 1.1)  | 539 | 
| Common Public License  | 265 | 
| Mozilla Public License 1.0 (MPL)  | 260 | 
| zlib/libpng License  | 245 | 
| Qt Public License (QPL)  | 205 | 
| Open Software License  | 184 | 
| Python License (CNRI Python License)  | 159 | 
| Academic Free License (AFL)  | 131 | 
| Python Software Foundation License  | 80 | 
| IBM Public License  | 70 | 
| PHP License  | 49 | 
| Apple Public Source License  | 44 | 
| Sun Industry Standards Source License (SISSL)  | 43 | 
| Sun Public License  | 38 | 
| Jabber Open Source License  | 36 | 
| wxWindows Library Licence  | 33 | 
| University of Illinois/NCSA Open Source License  | 29 | 
| Zope Public License  | 25 | 
| Nethack General Public License  | 24 | 
| W3C License  | 21 | 
| Intel Open Source License  | 19 | 
| Open Group Test Suite License  | 14 | 
| Sleepycat License  | 13 | 
| Apache License V2.0  | 12 | 
| Eiffel Forum License  | 10 | 
| Eiffel Forum License V2.0  | 10 | 
| Attribution Assurance License  | 9 | 
| Reciprocal Public License  | 7 | 
| Ricoh Source Code Public License  | 6 | 
| Historical Permission Notice and Disclaimer  | 6 |