Greenshot is the most awesome tool for making screenshots you can get on your Windows PC and Mac. It is incredibly user-friendly and above all else, completely free. The Greenshot app is a perfect companion to help with office automation or more casual tasks that require taking and editing screenshots.
What is Greenshot?
Greenshot is a lightweight screenshot software tool for Windows or Mac. It's an Open Source screenshot tool. Open Source software is released under a license in which the copyright holder grants users the rights to use, study, change, and distribute the software and its source code to anyone and for any purpose.
Also Read: ScreenHunter : Freeware Utility To Take Screenshots of Windows