Xinfinite has released iXiu 2.0 (http://www.xinfinite.nl/ixiu.html) in the Mac App Store. It requires Mac OS X 10.5 or later, costs US$4.99 and can be found in the Productivity category.
A visualized pasteboard application, iXiu is a tool to paste any thing at any time within any application on a translucent panel sticked below the menubar. In addition, iXiu can send your clipboard to another local iXiu user. With a right-click on the panel or one of its icons, it will show a contextual menu with several options. Or simply double-click on an icon to open your browser or another application associated with the data.
When iXiu is started, it will create a new panel below the menubar on the right side of your screen. This panel will appear when the mousepointer is moving above its tab. On this panel you can drop or paste anything you want.