Complete Cartoon City Set, low poly models very optimized assets. It is very usefull for mobile games. I already created a sample city scene with proper lightmapping.

Create your own city using this assets package.
The package contains:
Vehicles: Ambulance, two busses, four cars, police car, taxi, two trucks and two vans.
Hospital, petrol bunk, pharmacy, police station and school.
Six skyscrapers sets. (Each one skyscraper set has 17 to 20 buildings) Total buildings 110.
14 trees, bus stop, dust bin, fire cylinder, four type of barricades , two type of signal lights, telephone booth and 16 type of road sign boards

Four type of road sets.

Every asset and building included has a prefab set up for you. You can create your own city using this assets package.