XJRT is an open source Java renderer with a ray tracing backend. The renderer currently supports CSG and a variety of shapes and model formats. Objects can be created in Java or through XML, Java is used as the shading language for the renderer.
TacitPixel is a scalable C++ framework for building application prototypes for interactive collaborative VR/AR applications. It provides a number of features that make prototyping fast and portable.
TacitPixel is the successor of the TAP and Twisted Pair engines.