Show/Hide menu

Hi, have been sitting and tought about two blogs and saw that both got this nice show/hide menu, thikning off this one

Overview Full Review Screenshots Videos Links System Requirements, both got same menu it looks like, so i was wondering if that is a plugin or something like that ?

http://mmohut.com/review/atlantica-online

http://www.mmocrunch.com/mmorpg-game-list/?game=world-of-tanks