MATSim (the Multi-Agent Transport Simulation Toolkit) is an open source software development project developing agent-based software modules intended for use with transportation planning models.
"The MATSim project started with Kai Nagel, then at ETH Zurich, and his interest inimproving his work with, and for, the TRansportation ANalysis and SIMulation System (TRANSIMS)project; he also wanted to make the resulting code open-source. AfterKai Nagel’s departure to TU Berlin in 2004, Kay Axhausen joined the team, bringing a different approachand experience."[1]
MATSim has been applied to various areas: road transport,[2] public transport,[3] freight transport, regional evacuation etc. [1]