ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Lepton - Lepton image compression: saving 22% losslessly from images at 15MB/s
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
3Cols - Manage your code snippets in the cloud fast, easy and free for personal use forever.
LightShot - The fastest way to take a customizable screenshot.
SnipAway - A customizable snippet manager made for developers and people who work with code