I have frequently been asked where to get that nice litte Ogg Theora/Vorbis streaming applet. Well, the version I'm working on used to be its source hosted in the Wikimedia SVN, but development recently was moved to http://git.xiph.org/?p=cortado.git
A signed binary for Cortado is available at http://www.theora.org/cortado.jar - this one should always be rather recent.