ImageMagick 7
Image management application
Display, convert, and edit raster image and vector image files
View Sixel images in Windows, and Sixel image repository
Drawing, graphics conversion, software development, administration.
Convert BMP images into Sixel images
Convert Netpbm programs to GIMP plug-ins
Simple utility to convert PNG to JPEG
A full featured cross-platform image library
Convert APNG animations into animated GIF format.
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
Convert volumetric data to images.
Convert jpeg(exif/jfif)/mpo/jps image to/from xml