Simulation Islands
Given how widespread the usage of Box2D has been over the last decade+, I truly hope the creator has seen some form of financial benefit from it. His work is awesome and has benefitted the gamedev community immensely.He mentions Jolt physics in this blog. That’s another example of “holy shit look at what one person can do”. I’ve found myself wishing I had Unity source so I could performantly inject that engine instead of being stuck with PhysX.