Unreal Engine - Niagara Particle Collision
A test with self colliding particles. Based on the PBD_IntraParticleCollision example in the Niagara_Advanced map from the ContentExamples project. Uses a neighbourgrid to spread out the collision checking but then the actual collision response is a bit simplified compared to that one.
Really like how easy they have made it to basicly make compute shaders, but without all the hard and boring stuff surrounding that. :)