What are some useful iPhone aps for Car salesmen?

I work at a large preowned dealership. we have about 88 cars in our inventory. what are some good aps to manage inventory or possibly search for specific cars with a feature. i want an ap that i can type in "sunroof" and all the cars with sunroofs in my inventroy pop up. is there anything out there? or maybe something else that could be useful. I'm not limited to just inventory aps. maybe something else that dealerships use.