OpenRL or Open Ray Tracing Language aims to become the new standard (actually an open specification that will be submitted to the Khronos Group) in the area of real time ray tracing.
OpenRL is based on CausticGL, the software part of CausticRT.
Like OpenGL, OpenRL also includes a shading language called RLSL (OpenRL shading language) (RLSL), which is based on GLSL and provides run-time compiled programmable shaders for ray tracing.
OpenRL will be available for Windows, Linux and Mac OS X and will use all OpenCL-capable devices (GeForce 8+, Radeon HD 4000/5000 and all CPUs)
To download and test the BETA public SDK of OpenRL, just jump HERE.