voxel

3D model format specification and single header SDK. Supports skeletal animations, voxels and has the best data density

URANOS - the Ultra Rapid Neutron-Only Simulation is a Monte Carlo toolkit specifically tailored for Environmental Sciences

Axiom Nexus, an open source infinite-world block sandbox game with survival and crafting. [also https://gitlab.com/axiom-nexus/an-survival]

Main development tree for the 3D voxel world game Voxelands - www.voxelands.com (Menche's clone)

A C library for generating 2-D and 3-D coherent noise. Define your functions in a compact, functional language that compiles to OpenCL for maximum performance.