| Project | Copyright Ownership Policy | Rationale | License Back, if ownership required? | Relicensing OK? | Notes |
| FSF | Assignment required for code in FSF releases | Enforcement | Yes | FSF commits [to stay open source? | |
| Apache | |||||
| Linux | |||||
| GNOME | |||||
| KDE | |||||
| Mozilla | Assignment not required | Too many people and companies won't contribute if this is required | NA | No | Mozilla Foundation can change the Mozilla Public License if necessary to fix some problem. Not something that can be done for trivial reasons, or for reasons that contributors find offensive. Mozilla project did conduct one relicensing campaing (for the tri-licensing) by contacting contributors. This was a lot of work. |
| Perl | |||||
| Python | Under discussion | ||||
| mySQL | |||||
| Lucene | |||||