Landing Pages in MailChimp - Easy to build, custom landing pages for free
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!
Viral Loops for Startups - Virality for startups made easy 💪
Dinngo - Splitting payments the fun and easy way
Carrd - Simple, responsive one-page site creator.
/Tab - The simple way to split a bill among friends.