Godot Engine – Multi-platform 2D and 3D game engine

JSON for Modern C++

EASTL stands for Electronic Arts Standard Template Library. It is an extensive and robust implementation that has an emphasis on high performance.

A multi core friendly rigid body physics and collision detection library. Written in C++. Suitable for games and VR applications. Used by Horizon Forbidden West.

Range library for C++14/17/20, basis for C++20's std::ranges

Voxel Plugin Legacy for Unreal Engine

Modular node graph based noise generation library using SIMD, C++17 and templates