openDesktop.org - The website openDesktop.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
SourceForge - The Complete Open-Source and Business Software Platform.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Freecode - Freecode (formerly known as Freshmeat) is one of the legit open source development platforms that will be the key for developers and programmers to have a streamlined process via having enhanced collaboration and coding leverages.
LightShot - The fastest way to take a customizable screenshot.