Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Unity - The multiplatform game creation tools for everyone.
Mandelbulber - A 3D fractal renderer.
Godot Engine - Feature-packed 2D and 3D open source game engine.
TouchDesigner - TouchDesigner is a visual development platform that equips you with the tools you need to create stunning realtime projects and rich user experiences.
Structure Synth - Structure Synth is a tool for creating 3D structures from a set of user specified rules.