TempMail - Temp Mail is the provider of fake and temporary email ID.
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!
Mailinator - Any Inbox. Any Time.
Dinngo - Splitting payments the fun and easy way
10 Minute Mail - Temporary disposable e-mail service to beat spam. Avoid spam with a free secure e-mail address.
/Tab - The simple way to split a bill among friends.