Open Source Solid Modeling CAD
Various small and useful command-line utilities
Swiss army knife of image processing
Advanced PNG optimization program
Display, convert, and edit raster image and vector image files
medical image conversion utility
Retro Computer Image Library
Lynkeos is an astronomical webcam image processing software for OS X.
Tools to process and visualize scientific data and images
Drawing, graphics conversion, software development, administration.
Convert Netpbm programs to GIMP plug-ins
SIMD-accelerated libjpeg-compatible JPEG codec library
Extend abcm2ps to support direct generation of PNG, SVG and PDF files
Convert BMP images into Sixel images
Complete solution for HDR photography
Simple utility to convert PNG to JPEG
A C99 implementation for reading/writing WMF and EMF Graphic Metafiles
Transforms bitmaps into vector graphics