Google Lens - Discover information about something by taking a photo

Google Images - Google Images is a search service owned by Google that allows users to search the World Wide Web for image content.

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.

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

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

SauceNAO - SauceNAO is a reverse image search engine.