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.
Altair - Visually Analyze Any Data at the Speed of Business
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.
NETGEN - NETGEN is an automatic 3d tetrahedral mesh generator.