I wasn't sure where to post this, but some of you may know that I've been working on a lightweight inverse kinematics library implementing the FABRIK algorithm. I'd like some feedback and/or complaints and/or condolences on this.
https://github.com/TheComet93/ik
It's written in C89 and has no dependencies other than the C standard library.
You can find information on how to use it on the wiki page https://github.com/TheComet93/ik/wiki and also in the header files solver.h, node.h and effector.h.