The FastLED library for colored LED animation on Arduino
C++ header-only library that simulates GLSL math
Gphoton in a simple 3d modeler and ray tracer.
Multimedia asset management and manipulator for Étoilé
A C++ template library extending syntax towards mathematical notation
Computer vision and image processing library for Qt.
Free vector,quaternion,matrix math library
Obsolete: use https://github.com/VMML/vmmlib
A 3D rendering / entity engine