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

Screenshots Pro - Screenshots Pro is an app screenshot maker that helps you create a beautiful presentation of your app on App Store and Google Play.

Shutter - Shutter is a feature-rich screenshot program.

Shottr - Shottr is a free macOS screenshot app with scrolling screenshots, OCR, annotation and measurement instruments.

Snipping Tool - Use Snipping Tool to capture a screen shot, or snip, of any object on your screen, and then annotate, save, or share the image

Xnapper - Take beautiful screenshots instantly