BFM (Brutal Filemanager) is a mixture between a filemanager and a 3D shoot-'em-up game. In fact, you can't really manage the files yet, just shoot them up. Be carefull when using BFM! Some weapons, such as the shotgun, have spread. So files you didn't really aim at might get ... wasted. Start BFM with the '-s' for safemode and your files shall stay unhurt. It is written in Java and uses the Java3D API.
rtkmerge is a GUI to the emerge command to handle packages under the Gentoo Linux Distrubution. It was initially written to help when running 'emerge world' to update the entire system. With rtkmerge you get all the outdated packages presented in a list and you can easily select which packages you want and don't want. USE-flags can be set individually for each package.
transset-df is a heavily patched version of xorg's transset. It is used to set the transparency of windows in X with the xcomposite extension. It adds several command line options to make it easier to use directly, bound to hot keys in your window manager, or through scripts. These include the ability to select a window by window ID.