darktable is an open source photography workflow application
ImageMagick 7
A fast image processing library with low memory needs
Library to encode and decode images in WebP format
Swiss army knife of image processing
A collection of packages providing extra functionality for GNU Octave
Lynkeos is an astronomical webcam image processing software for OS X.
ProStack - a platform for image processing and analysis
Image processing library in C/C++
Tools to process and visualize scientific data and images
Resilient Image Library - successor to DevIL
Open Source Solid Modeling CAD
LDraw™ editor for LEGO® style digital building instructions.
Tools to access streams in PDF-files at the object level.
Collection GIMP plugins by zvezdochiot
Easy converting PNM to (MASK+FG+BG)-pdf.
Easy converting pgm and ppm to (MASK+FG+BG)-djvu.
Scanning Probe Microscopy Controller and Data Visualization Software
Improved JPEG encoder
a fork of the Panorama Tools / libpano13 with a fast PTOptimizer