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.
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.
im2avi is a small program for making AVIs from sequences of images. It makes use of avifile for encoding video streams, so im2avi has access to all the codecs that avifile supports, including DivX ;) or Cinepak. It uses the ImageMagick++ library to load the images, so it supports a wide range of formats.
image2mpeg is a tool to convert digital photos (or any other images) into MPEG video streams, with transitions between the images. The photo stream may be accompanied with music (or any other audio stream). The resulting slideshow may be prepared for VCD, SVCD, or DVD playback in stand-alone players, or the MPEG videos may be converted into FLV (Flash Videos). The type of transition can be selected for each image separately from a set of fade, slide, roll, etc.
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.