Klipfolio

KlipFolio is a system for managing a large number of widgets that you can build in the sidebar, or just randomly scatter around the screen as you like. It is also interesting that most widgets vary in size from a small button to a larger size. For example, the mail checker may be quite small and show only a number, which means the number of new letters, and when you hover the mouse, it will display headers and even a preview of incoming letters.

Review: internetno.net/2006/12/22/klipfolio
Website: www.klipfolio.com

There are cute skins and Russian interface.