Easy-to-use command line tool for images
Tool to create bitmaps and fonts for embedded applications.
Command line tool for scaling and denoising images
Create PDF from JPEG scans and photos
Converts between many 3D data formats
Convert images to Ascii Art, with a lot of options and drawing tools
Merge image files into a single Windows icon (.ico) file.
Converts AtariST images (.neo, .pi1, .pi2, .pi3) to gifs (using gd).