Skitch

Skitch screenshots

Take screenshots and export them to various image formats.
Configuring Screen Capture Settings
Skitch 2.8 : Configuring Screen Capture Settings

Alternative downloads

Clarify
2.0.11
Annotate screenshots on your Mac.
Apowersoft Mac Screenshot
1.1.2
This app enables you to take screenshots of your desktop.
Snapshot Editor
2.0.4
It helps you to capture screen, and annotate the screenshot image effortlessly.