Some time I need video or picture tools able to record mouse movements or desktop actions. For instance during my first RoboAdmin movies I’ve needed something to record how RA was answering to users queries. 
Jing is a well formed project, available for MAC and for WINDOWS in both cases free, that with its nice transparent and solar interface snap pictures of anything on your desktop. It’s really useful because it’s can store your snapshot immediately online just ready to be linked on you blog ! 
Here the complete video
Enjoy you SnapShot !