Where can I find icons to use with my Swing components?

Dean Gallant maintains a collection of icons as part of the JavaLobby Foundation Applications at http://jfa.javalobby.org/projects/icons/index.html. In addition, there are more icons available from http://www.ozemail.com.au/~afactor/iconolog/gif/index.html. and http://www.silverpoint.com/leo/lia/.