Widget5
- Image-processing package that supports 256 grey level (8bit), 65536 grey level (16bit) and 16.7 million colour (24bit) images.
- http://www.orac2.demon.co.uk/software/widget5/widget5.html

Variations
- Applies a range of changes, to a greater and lesser extent, to an image, showing 9 possible outcomes.
- http://compo.iconbar.com/variation.htm

DA's Picture
- [Freeware] Formerly commercial package for OS 3.5 and above.
- http://www.arcsite.de/hp/dapicture/indexuk.html

Sfmerge
- Very simple utility that merges several sprite files into one.
- http://www.armware.dk/files/sfmerge.html

Mksprite
- Makes pretty optimal sprite files from draw and Euclid files.
- http://www.armware.dk/files/mksprite.html

David Pilling
- Includes TWAIN drivers, and ImageMaster, an image editing program. Both are commercial software.
- http://www.netlink.co.uk/users/pilling/