Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Massive Prime - Animation
Mandelbulber - A 3D fractal renderer.
SGO Mistika - SGO Mistika is a suite of top-notch products designed to help with media content creation.
TouchDesigner - TouchDesigner is a visual development platform that equips you with the tools you need to create stunning realtime projects and rich user experiences.
SpeedTree Cinema - SpeedTree Cinema is a leading 3D Vegetation Modeling software preferred by many artists in the industry.