Phind - Shazam for landmarks and locations
Google Lens - Discover information about something by taking a photo
Snap Visual Search - Search for products and buy from Amazon via Snap's camera
GImageReader - gImageReader is a simple Gtk/Qt front-end to the Tesseract OCR Engine.
Songbird - With a focus on fans, Songbird personalizes music content from the artists you love the most.
OpenScan - FOSS Document Scanner