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...You can create one or more users, each of them can add his expenses and OpenFlat automatically calculates statistics and how much money you have to give to any other flatmates.
Everything can be done using the webapp with your own username and password.
Read the wiki for more informations http://sourceforge.net/p/openflat/wiki/
Peruser is a open-source lightweight knowledge application framework. Peruser speaks XML and RDF and is implemented in Java. Peruser code runs within Cocoon, as a standalone webapp, as console programs invoked through ant, or as embeddable java code.