CarpoolCalculator is a Adobe AIR application, can find out the exact cost for each person carpooling, help you determine the costs for every person sharing a car with you.
Both Equal and Unequal cost sharing options are provided. Also you can check calculations for daily, monthly and weekly easily.

Requirements:
* Adobe AIR

The license of this software is Free Trial Software, the price is $2.99, you can free download and get a free trial.