Image Colorizer - Colorize black and white images automatically
TinEye - Reverse Image Search to help find an image's source, duplicates or altered versions.
PhotoGlory - Restore old photos and colorize B&W with one click
GImageReader - gImageReader is a simple Gtk/Qt front-end to the Tesseract OCR Engine.
AI Picture Restoration - Free way to remove scratches, sharpen colors, and fix photos
Yandex.Images - search for images on the internet, search by image