Gmsh - Gmsh is a 3D finite element grid generator with a build-in CAD engine and post-processor.
Unity - The multiplatform game creation tools for everyone.
TetGen - A Quality Tetrahedral Mesh Generator and a 3D Delaunay Triangulator
Godot Engine - Feature-packed 2D and 3D open source game engine.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
ANSA - Product description of ANSA pre-processor of BETA CAE Systems.