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!
Documents by Readdle - A central hub for all your files.
Tesseract - Tesseract is an optical character recognition engine for various operating systems
Documents Pro 7 - The ultimate all-in-one mobile office suite for the iPhone and iPad with 8 premium apps in 1.
GImageReader - gImageReader is a simple Gtk/Qt front-end to the Tesseract OCR Engine.
GoodReader - With GoodReader on your iPhone, iPod Touch or iPad, you can read virtually anything, anywhere.