| 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 |