With "copious spare time" due to the closeout of our spring quarter, I got to digging around in some old software gathering dust on a harddrive here and there. For a few years running I had students in my second quarter, intro programming course extend a plug-in for Winamp. My kludgy code to get them going sufficed for its purpose but I was always amazed by the Advanced Visual Studio (AVS) plug-in. Spectacular visual effects with an extremely minimal data model and programming language. I'm not sure the AVS language is even Turing complete.
Last year, Nullsoft open sourced the plug-in code for AVS. I've always wondered about the core of what is essentially a programmable, real-time image processing engine. That should be an interesting read for anyone interested doing computational art. Wonder how dependent on DirectX the code is.
Apropos of nothing, it seems like there's a Wikipedia entry for everything.