gfxCardStatus

gfxCardStatus is n open-source menu bar application that keeps track of which graphics card your dual-GPU (late 2008/2009 w/ 9400M/9600M GT, or 2010 i5/i7 w/ Intel HD/330M) MacBook Pro is using at any given time, and allows you to switch between them on demand.

via gfxCardStatus: menu bar gpu status monitor for os x / cody krieger – mobile, desktop & web developer.