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!
Spicer - Mobile app for couples to improve sex.
SplittyPie - Create event, add users and their expenses.
iPassion App - iPassion is an app for couples and lovers! Explore each others' minds and preferences and get to know each other even better... A sexy game that gets the sex talks started!
Kittysplit - The easiest way of sharing costs with a group of friends
Couple quest - Simple "board-like" game for couples.