A simple raytracer in development, it supports the basic features of a raytracer along with multi-threading. Many platforms are supported (Win32, Linux, and iPAQ).

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.

A ray tracer distributed as C source, supporting almost every Unix version, Windows NT and Mac OSX.

Test bed system for physically based photo-realistic image synthesis, mostly radiosity based. Unix based.

Discuss programming techniques, algorithms and productions related to realtime raytracing, both software or hardware based.

A realtime raytracing engine with downloadable benchmark, screenshots and information. Windows 95/98/me/2000.

R.I.S.E. is an open source global illumination renderer for producing physically and biologically based photo realistic images. Product specifications, gallery, documentation, and downloads. [Windows, Linux, SunOS, Irix 6.5, Sun Solaris]

Ray tracing library written in c++ with python bindings. Source code, documentation, galleries, tutorials available. Binaries for Windows, seems to be portable to Unix platforms.

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

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.