List of python-constraint contributors and notable users (sorted alphabetically)

• Sébastien Celles - https://github.com/scls19fr - former maintainer
• Aron Griffis - https://github.com/agriffis
• Matt Kindy - https://github.com/mattkindy-praetorian
• Arun Mahapatra - https://github.com/codito
• Gustavo Niemeyer - https://github.com/niemeyer - initial author
• Floris-Jan Willemsen - https://github.com/fjwillemsen - current maintainer & developer

Full Github contributors list.

and maybe more...