= !OverSim = !OverSim is an open-source overlay network simulation framework for the [http://www.omnetpp.org/ OMNeT++/OMNEST] simulation environment. The simulator contains several models for structured (e.g. Chord) and unstructured (e.g. GIA) peer-to-peer protocols. !OverSim is developed at the [http://www.tm.uka.de/itm/index.php?lang=en Institute of Telematics], Universität Karlsruhe (TH) within the scope of the [http://www.scalenet.de ScaleNet] project funded by the [http://www.bmbf.de German Ministry for Education and Research]. The simulator is actively developed and open to contributions. If you have any questions regarding !OverSim, please send an email to [http://www.tm.uka.de/itm/people.php?id=43&lang=en Ingmar Baumgart] or the MailingList. {{{ #!html