Tesseract - Tesseract is an optical character recognition engine for various operating systems
Chess Tempo Database - Chess Tempo Database gives you a library of more than 2 million searchable chess games.
Onlineocr.net - Free Online OCR service allows you to convert PDF document to MS Word file, scanned images to editable text formats and extract text from JPEG/TIFF/BMP files
DecodeChess - AI chess tutor and analysis
Prizmo - Prizmo is a scanning application for Mac with Optical Character Recognition (OCR) in over 40 languages with powerful editing capability, text-to-speech, and iCloud support.
ChessPad - ChessPad is a feature-rich chess game viewer and PGN file editor available for Windows.