RentHoop - Tinder for finding roommates
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!
Roomr - Discover great people to live with
Splittable - Shared living made simple
Pack - Makes it simple to find the best roommates.
EquiTable - Split the bill fairly