Espresso

Espresso is an easy to use menu bar app that helps you prevent your Mac from automatically going to sleep, dimming screen or starting screen savers, even if you close the lid of your MacBook. - You can set the time that your MacBook must stay awake. - You can choose to keep your display awake or your system awake. - Very useful for file transfers, watching movies, presentations etc. Note: Espresso keeps your MacBook awake when the lid is closed only if your MacBook is connected to AC power.