in here you will find a few possibly useful things for emacs...
Replacement icons for Emacs
And if you want to build your own with the core motif, some PNGs...
Emacs Color Theme Editor
An Emacs theme editor, with the ability to edit an existing color-theme.
This is based on original work by Alex Pogosyan which is no longer online.
A Few Sample Themes...
Click a theme's caption to download it (*emacs-lisp file)