gfxCardStatus is an unobtrusive menu bar app for OS X that allows MacBook Pro users to see which apps are affecting their battery life by using the more power-hungry graphics. It also tells you which graphics card you are using.
When you have some lengthy task for your computer to do, it’s annoying to have to turn off your screensaver and turn off the sleep timer, only to have to turn it all back on again when you’re done. Jiggler is a freeware menu bar app that keeps your Mac awake. It’s a little helper that bumps your mouse every once in a while to keep your machine alert.
This free menu bar app prevents your Mac from sleeping, dimming the screen or activating the screen saver.