Awesome
Cross-platform GPU fluid simulation
Demo
This repo is a little old and dusty and likely doesn't build with the latest tools, If you're looking for a version with working build instructions check out this fork: BathBombFluidDynamics by Oliver Curtis which adds some interesting effects.
I'm currently working on a rewrite so watch this space :)
If you have an idea and you want to collaborate, feel free to get in touch with me haxiomic@gmail.com