Top 6 quaternions open source projects

An overview of different quaternion implementations and their chosen order: x-y-z-w or w-x-y-z?

Tangent space normal map blending via quaternion rotation

A short Godot addon that adds a TrackballCamera node without gimbal lock.

Julia implementations for different rotation parameterizations

📐 C# cross precision 3D maths library.

A Suite of Metal Examples written in Swift 4.2. Highlights: Model I/O - SceneKit - OpenEXR.