Conky is a great way to personalise your Linux desktop regardless of which distro or DE you’re using.
There are hundreds if not thousands of Conky themes available, ranging from simple stat tables to Lua-laden masterpieces. Chertan though shows the date, current weather conditions, an average CPU and RAM load, and the currently playing song in MPD.
It apparently requires a fair bit of directory swapping and file editing, but the end result is a setup that’s mostly usable.
See Chertan is a Cool Circular Conky Theme for Linux Desktops - OMG! Ubuntu!
When I began writing his post I thought it'd take 10 mins: show a conky, give the download link, walk through the installation. Two hours later, this post.