txtlabs.com
TXTLABSAll apps are now FREE! Contact: support@txtlabs.com. Capture the screen as a layered PSD for easy editing. In the Mac App Store. Capture full-length PNG screenshots of any website. In the Mac App Store. Preview Github Flavored Markdown. In the Mac App Store. Stop your Mac from going to sleep. In the Mac App Store.
http://www.txtlabs.com/