ImageMagick 7
A fast image processing library with low memory needs
ITTT is a Free tool designed to Scan and extract Text from Images.
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.
Easy converting PNM to (MASK+FG+BG)-pdf.
BRIC is a powerful tool for batch image processing.
A JBIG2 decoder written for Java under a BSD license