Make your own ringtone: Don't settle with the ringtones provided by Apple and you need not pay your carrier for more of them. As the name suggests, the free Ringtone Maker app lets you take a clip from your favorite songs and make ringtones out of them in seconds.
Feel and see when people call: Apple has added a number of accessibility features to iOS 5, specifically designed to assist those with hearing, vision, mobility and other disabilities. For example, those who are hearing impaired might opt to have the LED flash when a call comes in. If you're seeing impaired, you could set a unique vibration pattern for different people in your Contacts, so you know who's calling.
Find your lost iPhone: As long as you sign up in advance, the free Find My iPhone app will help you locate your device on a map (on your computer or other iOS device). You can display a message or initiate a loud ring (in case it's under the cushions), or remotely lock or wipe its data.
