Spaaze is an infinite virtual cork board, and you can use it to do almost everything.
Spaaze (pronounced "space") offers its users so called boards. Each board is an infinite space which resembles a virtual cork board - hence the default cork background, but other backgrounds are available. On these boards, items can be put. Currently Spaaze offers 7 different items: Labels, Notes, Bookmarks, Images, Files, Videos and HTML. These items can be edited in place, moved via drag and drop and positioned freely on the board. Therefore it's possible to arrange a bunch of items any way you like, which makes it possible to use it for many different use cases.... More Info »
To add some structure to the board it's possible to "remember" certain points (around which items have been placed) by creating hotspots (e.g. one per topic of a bookmark collection). Furthermore Spaaze is collaborative. This means that board owners can invite others to join them and edit their board as well. Finished board can be easily published, which creates public link of a read only view of the board to share it with others.
Spaaze runs on every modern browser (IE7+, FF4+, Safari4+, Chrome) and also on the iPad (with full multi-touch support).