Colorware iPhone Retro - A vintage, 80s-inspired iPhone
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!
Retro App Store - How App Store would look like if it was launched in 80s
Kittysplit - The easiest way of sharing costs with a group of friends
SplittyPie - Create event, add users and their expenses.
ihatemoney - Manage your shared expenses, easily