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

Giffing Tool - Giffing Tool is simply put: The fastest creator of high quality captioned GIFs available.

Shutter - Shutter is a feature-rich screenshot program.

GIPHY Create - Create animated GIFs from videos (by Giphy)

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

Instagiffer - Create GIFs from anything!