Tesseract - Tesseract is an optical character recognition engine for various operating systems
Chessvision.ai - Analyze chess position from any website, image or video.
ABBYY FineReader - ABBYY's latest PDF editor software, FineReader 16 you can easily convert files like PDF to Excel, PDF to Word, edit, share, collaborate & more with this PDF editor!
ABBYY Cloud OCR SDK - Highly-accurate ABBYY Cloud OCR SDK is available for everyone in a cloud through web API.
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
Free-OCR.com - Free-OCR.com is a free online OCR (Optical Character Recognition) tool.