Screen Image Capture Software

MS Windows:
GreenShot:  http://getgreenshot.org/
Screenshot Captor:  http://www.donationcoder.com/Software/Mouser/screenshotcaptor/index.html
EasyCapture:  http://www.xydownload.com/easycapture/index.html
Screenpresso Free: http://www.screenpresso.com/  (feature rich)
PicPik (free for non-commercial use):  http://www.picpick.org/download

others:
Zscreen: http://code.google.com/p/zscreen/
Faststone capture v5.3 (note newer versions are not freeware): http://www.portablefreeware.com/?id=775 or here http://www.aplusfreeware.com/categories/mmedia/FastStoneCapture.html

Mac OS X, iOS, and Android:
Skitch: http://skitch.com/

Chrome Browser (All platforms):
ScreenCapture: https://chrome.google.com/webstore/detail/cpngackimfmofbokmjmljamhdncknpmg
allows capture of entire webpage



For other screen shot capturing informatio see link to the Tip A Day by GeekBeat.TV video click below:
How to Capture Any Screen - GeekBeat.TV: We're introducing a new feature here at Geek Beat - Tip A Day. To start off, we'll show you how to do a screen capture on any device.