WP Total Hacks is a WordPress plugin by miyauchi that can customize more than 20 settings on your WordPress Site.
All items you can select to Active or Deactive.
Add a favicon.
Change admin header logo.
Change admin footer text.
Change login logo.
Remove selected meta boxes for Posts & Pages.
Remove selected dashboard widgets.
Remove unnecessary meta tags.
Change default email address.
Remove Update Notification for all users except Admin User.
Delete default contact methods from user profile.
Customize limit the number of allowed revisions.
Disable auto save.
Stop sending pings from your own site to your own site when you write posts.
Download and info: http://wordpress.org/extend/plugins/wp-total-hacks/