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!
Billsup - Billsup is the tool that aims to simplify your life!
Kittysplit - The easiest way of sharing costs with a group of friends
Mint - Free personal finance software to assist you to manage your money, financial planning, and budget planning tools. Achieve your financial goals with Mint.
ihatemoney - Manage your shared expenses, easily
Undebt.it - Undebt.it is a free, online debt snowball calculator and management tool that will help you quickly develop a debt elimination payment plan.