Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Capture2text - Capture2Text enables users to quickly OCR a portion of the screen using a keyboard shortcut.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
LightShot - The fastest way to take a customizable screenshot.
Boxoft Screen OCR - BOXOFT SCREEN OCR is a fast desktop utility program that lets you to capture screen and convert screen text into editable electronic text files fast and easily.
Snagit - Screen Capture Software for Windows and Mac