Short Reckonings is no longer in beta!
The latest version lets you signin using your Facebook account and invite your Facebook friends to your expense sheets. Many other user interface enhancements such as improved auto-complete when entering expenses, auto-complete when entering person names, faster application loading, etc. A lot bugs have been fixed too for an always smoother user experience.
More to come soon... (hint: offline mode)
http://shortreckonings.com
Very useful and user-friendly tool.
Reconcile debts with your friends: Enter a group of people and a list of expenses, indicating who paid how much for what and for whom. Short Reckonings calculates the fewest number of payments needed to reconcile the debts.
An ideal solution if you have to deal with the expenses for several roommates, travel buddies or family members.