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!
MyBrocard - Brocard allows you to create an unlimited number of virtual cards for paying for advertising and other online payments, manage a team of buyers, choose from 20+ bins for various tasks, and enjoy convenient API for integrations.
Memodude - Memodude keeps track of who you lent to, reduces your receivables and gets rid of bad payers.
PST.NET - Virtual payment cards for online shopping and advertising
WieBetaaltWat - With WieBetaaltWat you can manage a list with your shared expenses.
Coinramp - The Coinramp Card lets you spend over 10+ cryptocurrencies like cash, online, in-stores and ATM withdrawals. Available in 100+ countries, no ID needed. Anonymous Crypto Cards