Themeleon

Themeleon is a web theme editing assistant.
Themeleon provides an integrated interface that allows you to edit or replace any item in any theme for Wordpress, Drupal, Joomla, Mambo and more.

It provides a user-friendly interface between the contents of themes and your image and text editing applications. With Themeleon making theme modifications is easy and intuitive.
Themeleon assists you in editing or replacing design image files as well as editing text files such as: css, html, js, plist, etc..