POV-Ray

The Persistence of Vision Raytracer is a high-quality, totally free tool for creating stunning three-dimensional graphics. It is available in official versions for Windows, Mac OS/Mac OS X and i86 Linux.

Free Open Source Mac OS X Windows Linux

LuxRender

LuxRender is a physically based and unbiased rendering engine. Based on state of the art algorithms, LuxRender simulates the flow of light according to physical equations, thus producing realistic images of photographic quality.

Free Open Source Mac OS X Windows Linux

Clara.io

Clara.io is a full-featured cloud-based 3D modeling, animation and rendering software tool that runs in your web browser. With Clara.

Freemium Web

Artlantis Render

Artlantis Render is designed more for those who seek very high quality rendering (architects, interior designers, urban planners, landscapers, exhibition organizers...

Commercial Mac OS X Windows