Stealthy: Secret Messenger - Chat anonymously with friends & strangers
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!
Berkanan - Chat with people nearby. Even offline, on an ✈️.
Kittysplit - The easiest way of sharing costs with a group of friends
Roomvine - Chatrooms for real life venues, neighborhoods and events
ihatemoney - Manage your shared expenses, easily