Bumptop for MAC

Just now, I receive invitation Bumptop for mac....what is bumptop??

…a brand new way to look at your Mac desktop.
BumpTop is a full 3D experience with smooth, realistic physics, making your Mac’s desktop act more like the real desktop it’s sitting on.
BumpTop will stay out of your way, complementing all of the Mac OS X features you know and love: like Spaces, Exposé, and Quick Look.

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