KBookOCR is an easy to use graphical user interface wich allows you to recognize PDF or DJVU books and save it as a text file. Also it allows to recognize images from your scanner too.
1.3.1 — preview of scaned pages, some GUI usability improvements
1.4.0 — book pages thumbnails for recognition, batch scanning option
1.4.1 — ability to save the project file to open project next time and continue working from the last saved step