Well, for me it was I recall discovering this and upon installing it
being completely wowed in every way.

The ability to throw your icons around; grab them on an edge and spin
them around. Well I realize this is sounding dull but it is/ was not.
It turned your interface into a plausible physical environment,
blending in completly with everyday computer use to the point that
when on a different machine it felt rather wooden.

Very odd that, in the eight plus years I have known of it, the only
demonstration of gravité’s core physical effect is that of bumptop on ted.

http://www.wildbits.com/gravite/