Who Owes Whom was first released in 2008 and hasn't changed much since 2011. To my surprise, this tool is still used by many people. I now have the motivation to begin a new version that will fix 2 main issues: make the site mobile friendly make it simple, delete features nobody uses like the concept of debts you can simplify manually.
A blog about kidanki.net, yet another shared expenses and debts tracker web service.