I installed Apple’s Tiger friday and I did not have a lot of time to test it so far. Yet, I found a really cool application shipped with Xcode 2.0, Quartz Composer. You can use it to create scenes with Quartz (hence the name I guess :). In just a few click you can create incredible 3D scenes packed with impressive effects since you can use all the Core Images (and Core Audio) filters. It comes with a few templates you can use to create your own screensavers! Best of all, it looks great and it’s really easy to use:
It really is one of the best applications I have used for a long time. It you have MacOS X 10.4, give it a try, you’ll love it.