There are 2 repositories under polyrhythms topic.
Polyrhythmically-inclinded Midi Drum generator
Interactive music toy relating polyrhythms and harmony.
A web application developed in Javascript, that implements a polyrhythmic drum machine, based on the Web Audio Api. It provides a physical based sound generation system that lets the user play with gravity, to create unusual percussive and melodic patterns.
Polytronome helps you visualize polyrythms by layering multiple metronomes.
This program lets you play any polyrhythm of your choice, it's more of a personal project just to test my own coding skills, but i figured some people might find it interesting :)