Java ray tracing engine distributed under the GNU General Public License. Images, screenshots, download, and feature list.

The FAQ about speed optimization for raytracing for use in realtime raytracing.

Personal page with links to programs for modeling, Ray tracing, converting, and animating. Plus models for various ray tracers. Windows, MacOS and Unix.

Open Source Raytracer with a scene description language that provides constructs for programming like loops and functions. Its written in C++ and runs on Windows and Linux/Unix.

A game engine aiming towards three dimensional computer graphics which fits both human perception and the shape of the real world better than common polygon engines do. Linux.

An extensible system for creating ray-traced images. It is written in C, yacc, and lex, and runs on Unix, AmigaOS, OS/2, DOS and Older MacOS.

A Java ray-tracer running as a applet that wants to be simple and clean but nonetheless has some advanced features.