Google Lens - Discover information about something by taking a photo

GImageReader - gImageReader is a simple Gtk/Qt front-end to the Tesseract OCR Engine.

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.

SmartLens - Identify and learn about any object, instantly, using AI

Reverse.photos - Google Reverse Search, available at reverse.photos, lets you search by images instead of keywords.

TinEye - Reverse Image Search to help find an image's source, duplicates or altered versions.