Add more color themes and icons into your admin dashboard ! You can preview theme just clicking on it (JS required).
A dark style color scheme for WordPress admin.
Adminimize that lets you hide 'unnecessary' items from the WordPress backend
Grey color schemes for WordPress 3.8's admin area.
Adds admin color schemes for the visually impaired.
Use custom admin bar colors and favicons to differentiate your environments (staging/prod)
Random admin color scheme - auto change your admin color scheme every time wp-admin page loaded.
Get Japanese corporate data from Web API and use it on your theme.
Get even more WordPress Admin Color Schemes to bring some personality to your WP dashboard.