YafaRay
YafRay (Yet Another Free Raytracer) is an open source ray tracing program available under the LGPL license. It enables the creation of images and animations to a photo-realistic quality.
Yafray was developed in C++ and can be ported to a number of operating systems including Linux, Windows (9x, 2000 and XP), Mac OSX and Irix.
It has a number of rendering features including: global illumination, skydome illumination, caustics, depth of field and blurry reflections.
