Thriftyapp

Search Ridestar to find a ride to where you are going.

In addition to calculating the cost of gas, mOblu works for other modes of transportation from scooter to train.

A commenter mentioned this site that campaigns auto insurance options on easyautoinsurance.com.

Hotwire.com is an established discount travel site.  It plainly posts both the percentage off and final price for quick assessment.