Here's the one that I've been working on recently: https://github.com/ismailman/react-spho
My philosophy is different though that I want to make it absolutely dead simple to make UIs animate organically vs being a feature-filled animation library. I think React-SPHO is actually the easiest to use animation library for React available as most things you want to do "just work" and anybody reading the code using the library knows exactly what's going on without having to read any documentation so ramp-up for basic use cases is effectively instant.