TinEye - Reverse Image Search to help find an image's source, duplicates or altered versions.
Tesseract - Tesseract is an optical character recognition engine for various operating systems
Yandex.Images - search for images on the internet, search by image
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!
Google Images - Google Images is a search service owned by Google that allows users to search the World Wide Web for image content.
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.