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

Loom - Loom is a screen recording extension for Chrome that gives people the ability to create and share media. Create your own videos using your camera, screen view, and audio. Read more about Loom.

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

Bubbles - Drop comment bubbles anywhere on the screen, on any website.

LightShot - The fastest way to take a customizable screenshot.

recordit.co - Make a short video capture of your desktop as a gif.