RootCandy

RootCandy is a 3 column theme focused on administration section.

• Supports node/add /edit pages
• Re-colorable
• Icons
• Top navigation by role
• Simple dashboard
• 3 column fluid or fixed layouts
• Rootcandy dark sub-theme
• Icons in compact mode
• Sliding region

To know more, read the documentation -> http://drupal.org/node/325933, if you have any ideas please fill in a feature request.
Usage: I have posted a short blog post: Using RootCandy to create a simple interface for clients

UPGRADING - run update.php and/or make sure you clear the theme registry

Drupal 7 - port to Drupal 7 is now stalled.

If you would like to improve clients learning curve while they are using backend, try documentation tool Inline Manual.

You can follow me on twitter for more updates.