Appletell published a Mac OS X Leopard tweaking guide:
No matter how good Apple Mac OS X Leopard is, there will always be features that people dislike, and want to change. And while Apple may think they have the perfect recipe for a perfect OS, many power-users will want to tweak OS X to their liking. They want to change more than their desktop image, or the icons in their dock. Sometimes Apple doesn’t always make it easy to tweak your Mac, so Appletell has compiled a list of several ways to tweak your Leopard.