Unity - The multiplatform game creation tools for everyone.
Gmsh - Gmsh is a 3D finite element grid generator with a build-in CAD engine and post-processor.
Godot Engine - Feature-packed 2D and 3D open source game engine.
TetGen - A Quality Tetrahedral Mesh Generator and a 3D Delaunay Triangulator
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.