PyMP3Cut is a Python command line tool designed to cut huge (> 100MB) MP3 files at high speed without requiring the extra disk space and processing time usually needed by visual audio editing tools, which convert the MP3 format to more easily manageable formats like WAV before doing anything. It reads and cuts simultaneously according to the autodetected MP3 frame rate and a timeline passed as a command line argument. It doesn't currently deal with Variable Bit Rate (VBR) MP3 files, though.
LiquidMaya is a Maya to Renderman plug-in that handles full Renderman output support with a focus on speed, efficiency, and extensibility. Its features include procedural rib generation, full network rendering support, segmented rib files, a shader assignment interface, and much more. Along with the ability to write full C++ plug-ins, it is incredibly easy to script Liquid with Mel. Liquid was used for the visual effects of the "Lord of the Rings" movie.
Mxp (Mandelbrot explorer) is an X Window System application for computing and exploring Mandelbrot sets. Mxp supports zooming in and out, dynamic resizing of drawing windows, setup saving and loading, asynchronous image generation, GIF output, animation, nine color schemes, color rotation, color change options, and detailed statistics.
Fontlinge searches for font files, sorts them into folders by name and look and with human readable names, stores gathered font information in a database, generates previews and posters, finds and removes duplicates, and reunites PostScript font families. Also, Fontlinge has a Web interface to browse through your fonts. It shows detail previews and font info, provides font download as a tarball, and has the possibility to sort fonts.
Pysco is a neat utility for CSound. It generates CSound note events and saves to a score file, with unlimited separate output time-streams ("tracks"), unlimited simultaneous different tempos (each track can have its own tempo, including independent accelerandos and ritards), unlimited named "chunks" of events, and many more functions to provid automatic time updating so that the user doesn't have to count beats all the time. It also selects ranges of musical chunks by beat value.