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!
Roam - Live anywhere you want, as long as you want.
/Tab - The simple way to split a bill among friends.
Boxabl Casita - Housing meets mass production
EquiTable - Split the bill fairly
Outsite - Flexible co-living membership for $99/year