TinEye - Reverse Image Search to help find an image's source, duplicates or altered versions.
Wondershare PDFelement - All-in-one PDF editor
GImageReader - gImageReader is a simple Gtk/Qt front-end to the Tesseract OCR Engine.
Foxit PhantomPDF - Edit PDF files with our feature-rich PDF Editor. Download Foxit PDF Editor to convert, sign, scan / OCR & more. A speedy PDF Editor alternative to Adobe Acrobat.
Yandex.Images - search for images on the internet, search by image
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.