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.
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
Simple utility to convert PNG to JPEG
Create PDF from JPEG scans and photos
Graphic Live Mixer
Transforms bitmaps into vector graphics
Convert APNG animations into animated GIF format.
A full featured cross-platform image library
Convert GIF animations into APNG format.
A modified pngnq: convert png images to 256 colours.
Convert JASC pal files to png.
Convert an ICC profile from v2 to v4
Convert Photo CD to PPM
Universal graphics translator