LibRaw is a library for reading RAW files obtained from digital photo cameras (CRW/CR2, NEF, RAF, DNG, and others). LibRaw is based on the source codes of the dcraw utility, though some of the drawbacks of dcraw have been eliminated. The users of the library are provided with an API to be used when writing their software programs.
ps2tiffs extracts the sampled images from a PostScript document. It is not a PostScript renderer. ps2tiffs is a system where the grazer feeds on the output of a PostScript interpreter whose image operators have been replaced by special data-hijacking functions. This has the benefit of allowing the extraction of images regardless of how they have been encoded, formatted, scaled, or squished by the app which generated the PostScript document. It outputs greyscale, RGB, and CMYK TIFFs.
Image Alchemy has the ability to convert between over 90 different raster image formats (including all colorspace and compression variations of each format). Color management features include gamma correction, undercolour removal, seven high quality dithers, colorspace conversion, and palette manipulation. It also includes a Postscript interpreter.
netpbm-free is Debian's fork of netpbm that was designed with security of code, reliability of interfaces, and freedom of software in mind. It is a suite of over 200 different programs from different authors, and is itself a fork of pbmplus. The suite supports almost every graphic format (including JPEG, PNG, BMP, ICO), and can create, change, crop, rotate, and transform in and between these formats.