MATSim playgrounds were private projects of MATSIM developers. They were used for an easier re-factoring when the MATSim API was not as stable as today. Playgrounds were removed in 2018. Repositories of the main MATSim groups may be found at
- MATSim-vsp for the group around Kai Nagel in Berlin
- MATSim-eth for the group around Kay Axhausen in Zurich
- MATSim-up for the group around Johan Joubert in Pretoria
- MATSim SBB for extensions developed by the Swiss Federal Railways