| MIT License | 88 |
| GNU General Public License | 55 |
| Apache Software License 2.0 | 52 |
| BSD licenses | 35 |
| proprietary license | 32 |
| GNU Lesser General Public License | 27 |
| 3-clause BSD License | 23 |
| Apache License | 19 |
| GNU General Public License, version 2.0 | 19 |
| GNU General Public License, version 3.0 | 14 |
| 2-clause BSD License | 10 |
| freeware | 9 |
| GNU General Public License v3.0 or later | 7 |
| GNU General Public License, version 2.0 or later | 7 |
| GNU Lesser General Public License, version 3.0 or later | 6 |
| zlib License | 6 |
| Eclipse Public License | 5 |
| GNU Lesser General Public License, version 2.1 | 5 |
| Mozilla Public License | 5 |
| Mozilla Public License, version 2.0 | 4 |
| PostgreSQL License | 4 |
| Artistic License | 3 |
| GPL linking exception | 3 |
| shareware | 3 |