Free and open source voxel art tools - editor, thumbnailer and format
ImageMagick 7
Library to encode and decode images in WebP format
A fast image processing library with low memory needs
A portable, multi-platform, command-line driven graphing utility
Advanced PNG optimization program
Swiss army knife of image processing
A collection of packages providing extra functionality for GNU Octave
medical image conversion utility
Retro Computer Image Library
Drawing, graphics conversion, software development, administration.
Open Source Solid Modeling CAD
Various small and useful command-line utilities
Image processing library in C/C++
Convert Netpbm programs to GIMP plug-ins
Extend abcm2ps to support direct generation of PNG, SVG and PDF files
converts between IGES file and text file
Rayshade raytracer