/Tab - The simple way to split a bill among friends.

Splitwise - Splitwise is a free tool for friends and roommates to track bills and other shared expenses, so that everyone gets paid back. On the web, iPhone, and Android!

Splid - Splid helps friends manage their money.

Splittable - Shared living made simple

Kittysplit - The easiest way of sharing costs with a group of friends

Dinngo - Splitting payments the fun and easy way