Microsoft & Yahoo! do as well, I'm talking Widgets. Those little (mostly useless) apps that sit on your desktop.
I was first introduced to these when I upgraded my iMac to OS/X. Some of them are really clever & neat & interesting (clocks, stock market quotes, reminders, WiFi signal strength, CPU usage, weather reports & newsfeeds etc.), but others are just complete shite - a hexidecimal clock is merely one inane example!