Stonly - Create interactive step-by-step guides
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
ScribeHow - Create step-by-step user guides, with a simple click
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
The Spoke - A social discovery app powered by the people you trust.
LightShot - The fastest way to take a customizable screenshot.