Google Lens - Discover information about something by taking a photo
TagSpaces - TagSpaces is an open source platform for personal data management. With TagSpaces you can manage and organize the files on your laptop, tablet or smart phone.
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.
allTags - allTags is a free, tag based file management application.
GImageReader - gImageReader is a simple Gtk/Qt front-end to the Tesseract OCR Engine.
Elyse - The free version allows up to 30 tags.