Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Mandelbulber - A 3D fractal renderer.
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.
TouchDesigner - TouchDesigner is a visual development platform that equips you with the tools you need to create stunning realtime projects and rich user experiences.
ZBrush - ZBrush is a digital sculpting and painting software solution.
Structure Synth - Structure Synth is a tool for creating 3D structures from a set of user specified rules.