As an alternative to the most commonly used PDF document format at present, the advantages of DjVu format (from France) are quite obvious: on the premise of storing the same content with same quality, it is much smaller, more readable and opens much faster than PDF. In this case, for any PDF documents with large file size, we might as well convert them into DjVu format, so as to get more convenience.

Nuance's OmniPage owns superior OCR recognition accuracy and complete, perfect formatting, allows to capture text with a digital camera, works well with any scanner and office applications. Plus, it supports efficient batch processing, has built-in automatic redaction and highlight feature and can recognize 120+ languages.

FreeOCR is a simple and practical OCR (Optical Character Recognition) software for Windows. Designed to quickly and easily convert scanned files into editable electronic text files.

Cool PDF Reader is known as the world's smallest multi-function PDF reader freeware. It allows you to view, edit (extract, crop), print or convert PDF files to TXT, BMP, JPG, GIF, PNG, WMF, EMF, EPS, TIFF formats.

CutePDF Writer (formerly known as CutePDF Printer), after installed, it is equivalent to install a virtual printer driver (printer subsystem).