Loki Render allows you to create your own render farm, serving Blender render jobs to a group of computers. Loki is easy to setup and runs on Linux, Windows or Mac, making it a quick and flexible distributed network rendering solution!
nemosomen is a framework for designing open source, network based, multimedia (video/openGL/sound/MIDI) realtime toys
a suite of tools for distributed development, processing of media. It tries to shift most of the working process in realtime processes.
The openMosixApplet lets you watch the realtime load of your openMosix cluster. It consists of a local daemon which listens for connections by applets. The applet uses chart2D to provide a good-lookin' feeling.