Widgets

Everyone knows about widgets, but which would be the best? Yahoo! Widgets, Dashboard (By Apple) or Windows Sidebar?

Yahoo! Widgets
Yahoo! Widgets contains a whole library of widgets that can be launched by something called Dock. It can be used on Windows and Mac platforms.

Dashboard
Dashboard on the other hand, is a part of Mac OS X (Tiger and Leopard only) and the widgets cannot be used by Windows PCs.

Windows Sidebar
Windows Sidebar is a component of Windows Vista and its widgets are rather limited.

Conclusion
Yahoo! Widgets is most prefered as it can run on both Windows and Mac platform and with the help of third-party software, probably Linux too.