That's it! After several months of development, the first version is released. It includes the following features. Identification Login with your existing Google, Yahoo, Facebook or OpenId account. Logout Switch user: if you and your roommates use the same computer to access whooweswhom, this allows you to connect in one click. Shared expenses Create/delete list of expenses. Mark list of expenses with labels. Invite people to enter expenses (GMail and Yahoo contacts importer). Add/delete/update expenses in a spreadsheet, Show statistics about a list of expenses (sum by participant, average by month, sum by category, ...). Close a list of expenses: generates debts induced by a list of expenses. Debts Create/delete debts. Synthesize all your debts from different groups, different list of expenses and with different currencies. Mark debts as paid. Screenshots: