3rd version of the Energy theme.
It is darker than official, good for darker workspace, concentrate more on work than UI.
To find stuff quickly, look for WHITE (menu topic) then look for ORANGE (menu items).
For Blender version 2.62 and up
You can also find frequent updates of the theme at
https://studiollb.wordpress.com/2011/12/24/blender-energy-foss-power/ (please scroll to bottom of page to find links)