I recently took part in a programming contest in which you were supposed to create a 'drawing program'. As a result I created a new ray tracer that is now downloadable in the experimental stuff section.
Most of its ray tracing code is based on my first ray tracer but this new one generates much prettier images. It creates a mountain scenery using numerous graphical effects and draws polygons that are not just vertical or horizontal as in my first ray tracer.
On the other news, there is going to be a new version of Rotko quite soon including sounds and an online scoreboard for example.