YAFRAY free raytracing

yet another free raytracer for MACOS X, Windows and Linux

"YafRay is a powerful raytracer, under the LGPL license. It enables you to create fantastic images and animations of a photorealistic quality."

render features:
Full Global Ilumination
Skydome Ilumination
HDRI Ilumination
Caustics
Real DOF
Glossy/Blurry reflections

flexibility:
Modular Framework
Integration in 3dsuites via plugin
Platform Independent
Standa-lone render engine
Distributed and multithread render

yafray.org