Does anybody know a way to "skin" Java desktop applications. (Like Winamp skins, or skins for MirandaIM)? I don't want to create my own look and feel.
Yes, there are a few ways this can be done, but I don't know anyone that is really simple. Have a look at Nimbus: The New Face of Swing, it contains a few examples. You can often override the look of components or just change the colors.
Some links:
And you can always change to another LaF, in example Substance.