chemfp has two development tracks. The 1.x track is available for no cost under the MIT license, and the 3.x track is available for a fee.
Chemfp 1.x licensing
Chemfp 1.4 is the most recent version of the chemfp 1.x track. You can
download chemfp 1.4
directly or install it from PyPI using
pip install chemfp.
This version of chemfp is distributed under the MIT license, though it includes some third-party components which are distributed under a similarly permissive license. For details, see the license section of the chemfp 1.4 documentation.
Chemfp 3.x licensing
The most recent versions of the 3.x track are available with several different licensing options.
- A pre-compiled Python package for Linux is available for evaluation purposes. Some parts of this version require a time-based license key.
The other license options include the source code under a permanent license which does not require a license renewal and does not require a license key. There are "source available" licenses, which includes the right to modify chemfp, though not the right to redistribute chemfp:
The academic license is for public research and education. It can be used for research where the results are meant to be published in the open literature, in the development of web servers which are meant for general public use, and for student use where the goal is education or training.
The single-site license is meant for an organization (typically a company) where all of the chemfp users are primarily located at one geographical area. It may not be used for contract work for other organizations.
The world-wide license lets an organization use chemfp for internal purposes at any of its sites. It may not be used for contract work for other organizations.
In addition, chemfp is still available as open source:
- The open source option gives you access to the source code under the same MIT license used in chemfp 1.x.
Other license options are possible. Contact email@example.com if you have questions.