Not really automotive, but
barcode scanner
Amazon price checker
Flashlight
Light Flow Lite--(allows different color LED flashes for different email accounts, missed calls, text messages)
Pandora
TuneIn Radio------Unbelievable!
RadarNow--weather radar.
SoundRecorder
Ebay--this app has come in handy where there was an auction I had to win for a Christmas gift for a relative and I was away from home and I needed to last moment snipe.

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85' 300D No inspection, No registration fees, Cheap insurance
"If my calculations are correct, when this baby hits 88 miles per hour, you're going to see some serious %$&^."