Same feature set as Splitwise, but without annoying monthly costs! And it is really beautiful, fun to use, recommended!!
Tricount - Manage and share expenses with friends
Kittysplit - The easiest way of sharing costs with a group of 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.
Settle Up - SETTLE UP is an indispensable app for friends and flatmates who need to keep track of shared bills...
SplittyPie - Create event, add users and their expenses.