Although both Open Source Software and Free Software mean that the source code of the software is available, there are subtle differences between the 2 licences in their authority to re-distribute and in the right to work with proprietary software.
Open Source software
- Original author has the final say to whether a user-modified software is distributable or not
- Allowed to work with proprietary software
Free software
- Original author has no power to call whether a user-modified software is distributable or not
- Not allowed to work with proprietary software
