OCRFeeder is a free and open source optical character recognition and document layout analysis application for Linux. You can add images and pdf files for character recognition and export your content in ODT, HTML, PDF and plain text. It comes with four build-in OCR engines, Tesseract, GOCR, Ocrad and Cuneiform. It is released under open source GPL-3.0+ license. Some other features are spellchecker, unpaper, import image from scanner and image deskewer.