Need App for Sharing Travel Expenses with Group

There used to be an app called Travelstormer that worked really well with splitting up travel expenses within a group, but the site no longer exists. You'd basically create a trip, add everyone's email to it, and then everyone could contribute to adding expenses, and the app would tally up everything and show how much each person owed. It also gave options to pay, like paypal.

Has anyone used anything similar to this?