ImageMagick 7
darktable is an open source photography workflow application
Image management application
Swiss army knife of image processing
Display, convert, and edit raster image and vector image files
Lynkeos is an astronomical webcam image processing software for OS X.
VCF vcard, XML xcard, JSON jcard;View, Edit, Convert, Export, CSV, QR
Drawing, graphics conversion, software development, administration.
View Sixel images in Windows, and Sixel image repository
Convert Netpbm programs to GIMP plug-ins
Convert BMP images into Sixel images
Scanning Probe Microscopy Controller and Data Visualization Software
Objective-C embedded development libraries
Simple utility to convert PNG to JPEG
Create PDF from JPEG scans and photos
A portable library and tools for archiving images of Atari 8-bit tapes
Graphic Live Mixer
Transforms bitmaps into vector graphics
Convert HPGL to ReGIS and a ReGIS image repository
Convert APNG animations into animated GIF format.
A full featured cross-platform image library