GramoFile is intended primarily for transferring gramophone records to CDs, but has many other possible uses. It can record very long .wav files with a bargraph signal peak-level meter, playback any part of the files, split long .wav files into separate tracks (with automatic track location), and process the signal with filters to reduce ticks and pops (multiple filters are provided, they can be applied in any order (multiple instances) with user-adjustable parameters). Track splitting and signal processing are done in the same run, and don't need any temporary files.
The GIMP IFF plugin allows you to load and save .iff/.lbm pictures. It supports 1-8, 24bit planar images, 3-8bit HAM and EHB images, 12/24bit Imagine/TurboSilver pictures and DPaint IIe output. It saves indexed, grayscale and 24bit. Compression is supported, as well as transparency (masks) in most cases.
Ginko is a simple "wish" application, which provides a GUI front end allowing a flatbed scanner and a Hewlett-Packard LaserJet printer to be used as a copier. It uses the SANE package to drive the scanner, the NETPBM package to convert scans to PostScript or PCL, and whatever version of lpr you have installed to do the printing.
Gepetto provides a framework to animate characters. It lets you record choreographies and build complex moves using elementary actions. Gepetto is fully graphical and offers real-time rendering of the animation, but there is an undelying textual language describing the moves which can be used directly.