Wikipedia
Ocrad
Ocrad is an optical character recognition program, and part of the GNU Project. It is free software, and is licensed under the GNU GPL.
Based on a feature extraction method, it reads images in portable pixmap formats known as Portable anymap, and produces text in byte (8-bit) or UTF-8 formats. Also included is a layout analyser, able to separate the columns or blocks of text normally found on printed pages.