The Motion Toolkit is a collection of C++ class templates providing basic types for applications involving 3D geometry, kinematics and dynamics of systems composed of rigid bodies. The toolkit contains sample code for "Game Engine Gems 3" - Chapter 10. "Rotational Joint Limits in Quaternion Space".
A toolkit of useful functions for processing C++ STL vectors
KWANT is an open source C++ toolkit for computing scores and other metrics for object tracking systems.
A collection of tools for modifying and optimizing glTF assets
A C++ framework for MDPs and POMDPs with Python bindings