DeuTex is a wad composer for Doom, Heretic, Hexen and Strife. It can be used to extract the lumps of a wad and save them as individual files. Conversely, it can also build a wad from separate files. When extracting a lump to a file, it does not just copy the raw data, it converts it to an appropriate format (such as PPM for graphics, .au for samples, etc.). When it reads files for inclusion in pwads, it does the necessary reciprocal conversions. In addition, DeuTex has functions such as merging wads, etc.
PLIB is a set of libraries to write games and other realtime interactive applications that are 100% portable across a wide range of hardware and operating systems. It's used by Majik3D, FlightGear, and others, and includes libraries for GUI widgets, sound replay, geometry, scene graph, joystick, and fonts/text.
Scilla answers media file requests and takes conversion parameters for various media converters. Manipulated media files can be cached for future requests. Scilla is designed to take requests using the servlet API. A HttpServlet is included, and it maps path-info to a file and passes request parameters to converters.
Enscribe creates digital audio watermark images. The rasterlines of an image are converted into frequency components via an inverse fast fourier transform. The watermarks sound like soft hissing, but when viewed in a frequency-versus-time display, the image is clearly visible. Manipulation of the audio file, such as by MP3/Ogg compression, reverb, or flange, muddies the image, but it remains visible.
Garbure is a collection of dedicated distributions. Each distribution provides carefully selected tools for a specific target domain, and is completed with examples and documentation. The set of distributions forms an entity, but each distribution works also on its own. All elements are arranged in the same way for each distribution.