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

Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.

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

ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...

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.

LightShot - The fastest way to take a customizable screenshot.