Free Pick: Caffeine - Don't let your Mac fall asleep

If you watch movies on your Mac, you know how irritating it can be when your Mac decides it's been idle for too long and dims the screen. Or, how 'bout when you're reading a web page and your Mac believes its time to start-up the screen saver? Oh, and how about when you're working on your laptop in patio (its nice out there) and you can't access your desktop in the office because its gone to sleep?

Caffeine, from Lighthead Software, is a wonderful little application that prevents these untimely annoyances - faster than changing System Preferences.

You control Caffeine via the icon it places in the menu bar. It's as simple as a single click to prevent your Mac from automatically going to sleep, dimming the screen or starting a screen saver.

Right-click (or hold down the Command key and click) the icon to show a menu of more options. You can set Caffeine to keep your Mac awake indefinitely, or for predefined lengths of time. (See screenshot.)

Make you Mac stay up late, with you, with Caffeine.