http://www.widgetworld.nl
is running for quite a long time on Joomla (previously on Mambo). Specially made for Mac users (and that is quite a problem!!! So much is Windows based, luckily there was Joomla and RocketTheme! ;D ) and their Dashboard Widgets. The website tries to be an archive for those Widgets. It has some nice modules and components, some a bit tweaked. The main component this website is built around is the DocMan module.
The website is based on the Versatililty Theme. I am looking into changing the WidgetWorld website into the Versatililty II version, but personally the colours of version I Versatililty seem to fit better. But the Suckerfish-menu is a very tempting one to perhaps make the change.