gfxCardStatus is an unobtrusive menu bar app for OS X that allows MacBook Pro users to see which apps are affecting their battery life sort by which are the more power-hungry graphics.
Features:
Growl or Notification Center notifications when the GPU usage changes.
The Dependencies list: Open the gfxCardStatus menu when your discrete GPU is active to see what is using it.
Manually switch to Integrated Only or Discrete Only mode to force one GPU on or the other.
Download Link: https://gfx.io
Requirements:
OS X Lion (10.7) or newer
2008-2012, 15-17" dual-GPU MacBook Pro
gfxCardStatus is localized in 22 languages:
Brazilian
Czech
Danish
Dutch
English
Finnish
French
German
Greek
Italian
Korean
Latvian
Polish
Portuguese
Russian
Simplified Chinese
Slovak
Spanish
Swedish
Traditional Chinese
Turkish
Ukranian