I use library I have written:
github: https://github.com/treeform/vmath docs: https://nimdocs.com/treeform/vmath/vmath.html
See a 3d gltf loader written using vmath: https://github.com/guzba/gltfviewer See orbital mechanics using vmath: https://github.com/treeform/orbits
I use vmath in pretty much all my projects.