ECLiPSe is distributed under an instance of the Mozilla Public License 1.1, which, informally speaking, means:
- You may use it freely for any purpose, including commercial
- You may use it as part of a larger work, without your own components being affected by the license
- If you make modifications to any ECLiPSe source files, you must contribute them back under the original license
To be precise, the above license applies to the ECLiPSe core which was released under this licence in 2006. Since then, additional libraries have been contributed, some of which may have different (but typically no more restrictive) licenses. For details, please refer to the documentation of those individual contributions.