are some nifty applets by an Italian gentleman named Fabio Ciucci. These things are usually incredibly annoying, but his are well enough done to be compelling, particularly the ones that pick apart images pixel by pixel, like the water applet.
Two useful free services: QuickTopic and Spyonit. QuickTopic is the new name for the extremely useful service formerly called TakeItOffline. Within seconds, you can spawn a free discussion group. Spyonit watches websites, among other things, so that you don’t have to visit a site often in order to find out that it’s changed. Somebody else watches and then tells you.