Zamzar - Free conversion online of many type of documents (images, text, video, audio...
Tesseract - Tesseract is an optical character recognition engine for various operating systems
Online Convert - Convert files like images, video, documents, audio and more to other formats with this free and fast online converter.
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
Convertio - File Conversion in the Cloud
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!