Hello,
I've created a small KISS/suckless public domain 3D physics engine in pure C, single header, with no dependencies, using only fixed point, similarly to my other libraries such as small3dlib. It's basically for people who hate bloat and/or want to program for tiny devices and/or just want a simple physics without any hassle. You can get it at
https://codeberg.org/drummyfish/tinyphysicsengine
Beware, it is quite simple and not physically accurate, it is basically a soft body engine but can also fake rigid body physics. It is not a robust framework, it doesn't come with clicky GUI tools, it's just pure C functions that will help you implement simple portable physics that can run basically on anything. Mainstream game devs probably won't find this interesting but I'd like to share this for the few of us who like the approach of high simplicity. It was also kind of an experiment in how much this would work, I haven't seen many other engines like this.
I am planning to make a simple trackmania clone with this, the engine is basically the first step towards my game, but I tried to make it so that it can be used for many different things. That's about it, thanks and enjoy