IPBForumSkins - Gravity Green Skin for IPBoard v3.1.4 | 1,05 MB
The Gravity design is a modern "web 2.0" layout utilising a collapsible sidebar to contain all navigation. The design also includes descriptions-on-hover to reduce clutter on smaller resolutions.
DEMO:
http://www.ipbforumskins.com/premade/gravity_green/index.php