Skitch is a simple, powerful image manipulation utility for Macs, iPads and Android handsets and tablets.
Skitch allows you to quickly annotate, resize, rotate and share all kinds of images including photos taken with your mobile camera or iSight, screenshots — virtually any image on your Mac or Android device.
Skitch for iPad is available as a free download from the iTunes App Store. Grab Skitch for Android for free from the Android Market. For Mac users, Skitch for Mac is available for free in the Mac App Store.