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

Enpose - The simple screenshot bot

MWSnap - MWSnap is basically a free to use Windows snapping tools that are used for snapping any part of the screen that is currently displaying on the front of all opened programs and windows.

TextSniper - Instantly extract any text from your Mac's screen

Shutter - Shutter is a feature-rich screenshot program.

Screely - Screely instantly generates dribbble-ready images. Simply upload your screenshot and we'll do the rest.