GImageReader - gImageReader is a simple Gtk/Qt front-end to the Tesseract OCR Engine.
TinEye - Reverse Image Search to help find an image's source, duplicates or altered versions.
Adobe Scan - Scan anything into a PDF using your mobile device.
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.
Yandex.Images - search for images on the internet, search by image
Microsoft Lens - Microsoft Lens (formerly known as Office Lens) is an all-in-one application designed for Windows, Android, and Apple devices, allowing you to capture important information from signs, PDFs, whiteboards, and more to add.