"If you've taken a look at KDE 4, you will have noticed
significant changes to the desktop. Many people feel these changes
have made the KDE desktop less usable. By default, I would say that
is certainly the case. But with KDE 4 comes one addition to the
desktop that helps it out significantly: widgets -- tiny
applications that reside on the desktop and serve one or more
functions. Most new KDE 4 users have yet to experience what these
widgets have to offer. But if you're not taking advantage of these
added tools, you're not getting the full KDE 4 experience.
"Quite a few widgets are available for the KDE 4 desktop. Some
serve little to no function. Others, however, can make your
day-to-day computing life much easier. Here are 10 widgets that
will make you more productive."