Here is an inevitably incomplete list of MUCH-APPRECIATED CONTRIBUTORS -- people who have submitted patches, reported bugs, added translations, helped answer newbie questions, and generally made PyTweening that much better: Al Sweigart (al@inventwithpython.com) Denilson Figueiredo de Sá https://github.com/denilsonsa Julien Schueller https://github.com/jschueller Marek Madejski https://github.com/TrangOul Stefanie Molin https://github.com/stefmolin