BEST APPS...

For discouraging texting while driving

DriveMode blocks all calls, texts, and emails, and prevents drivers from reading or typing. When you select the app, it sends out auto replies to let people know that you’re driving. (Free; AT&T only)

Textecution automatically disables texting whenever your phone is traveling at speeds exceeding 10 mph. But you can send a request to the admin to override the block if you’re just riding in a fast-moving car, not driving it. ($30; Android)

text-STAR uses the same 10 mph speed limit as Textecution, and also allows you to schedule auto-reply texts in advance, for periods when you know you’ll be on the road or otherwise occupied. (Free; Android)

DriveSafe.ly doesn’t block incoming texts; instead it reads them aloud. It allows you to respond by voice instead of with your fingers. (Free; iOS, Android, Blackberry)
Source: Mashable.com