ImageMagick 7
A fast image processing library with low memory needs
Scan Tailor Experimental is an interactive post-processing tool
ADAMS is a workflow engine for building complex knowledge workflows.
Tools to access streams in PDF-files at the object level.
Command line app for creating a particular color scale to images
BRIC is a powerful tool for batch image processing.
A JBIG2 decoder written for Java under a BSD license