I have two SuperKaramba themes (widgets, sort of) running at all times. The one on the left is called ubermon, and it’s one of my favorites. I see information about RAM usage, up time, various partitions, one-click access to some of my favorite web sites, and media player buttons.
The theme on the right is Liquid Weather ++ (version 15.0), which keeps me posted about weather in my little town. There’s a 5-day forecast, too.
I’ve got lots of icons showing my most used programs: BibleTime, StarOffice, OpenOffice, Swiftweasel (Firefox for Linux), Opera, Thunderbird, gtkpod (manipulates media for iPod Classic so I don’t have to boot into M$ Windows) and gPodder (podcast catcher for Linux).
So, what about your desktop?