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

Mitsuba

Physically based renderer. Mitsuba is an extensible rendering framework written in portable C++. It implements unbiased as well as biased techniques and contains...

Free Mac OS X Windows Linux

YafaRay

YafaRay is an open source raytracing render engine. As an open source project, users and developers have free access to the source code and it is free, as in free speech.

Free Open Source Mac OS X Windows Linux Blender

Kerkythea

Powerful, feature-rich and fast standalone raytracing renderer. Exporters from Blender and Google SketchUp are also available. Allows network rendering of images and...

Free Mac OS X Windows Linux Blender Sketchup

appleseed

appleseed is a modern, open source, physically-based rendering engine designed to produce photorealistic images, animations and visual effects.

Free Open Source Mac OS X Windows Linux

Sunflow Rendering System

Sunflow is an open source rendering system for photo-realistic image synthesis. It is written in Java and built around a flexible ray tracing core and an extensible...

Free Open Source Mac OS X Windows Linux

RenderMan

PhotoRealistic RenderMan, or PRMan for short, is a proprietary photorealistic RenderMan-compliant renderer. It primarily uses the REYES algorithm but is also fully...

Free Personal

Indigo Renderer

Indigo Renderer is an unbiased, physically based and photorealistic renderer which simulates the physics of light to achieve near-perfect image realism. With an advanced...

Commercial Mac OS X Windows Linux

Octane Render

Octane Render is the world's first GPU based, un-biased, physically based renderer. What does that mean? It uses the video card in your computer to render...

Commercial Mac OS X Windows Linux

Adobe Dimension CC

Create high-quality, photorealistic images with the 3D tool made for graphic designers.

Commercial

owlet

Owlet is a stanadlone, unbiased, physically-based raytracing renderer. It takes your 3D files in many formats, allows you to setup the scene and renders them using a...

Commercial Mac OS X Windows

FPrime Rendering System

Realtime rendering, giving you instant feedback on every step of your work. Interactive texturing, lighting, shadows and radiosity. Even Nodes! The key tool to efficient...

Commercial Mac OS X Windows LightWave