gravbook is an application that will search through your address book to find contacts with gravatars. If you have a contact that has a gravatar, their gravatar will be applied to that contact. This program automatically matches gravatars to your contact. Moreover, you can choose whether to overwrite existing contact images or not.
View planets and their moon from Solar System on your Mac.
This app lets you choose from various wallpapers for your desktop.
Classify desktop pictures whenever you change or get a new wallpaper.
Create your own dynamic desktop wallpaper for your Mac.
Live Desktop makes the Mac desktop alive with amazing live themes.
Offshoots is for animating the wallpaper of your desktop with growing trees.
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