BIMSERVER is an open-source platform with a plug-in architecture that allows for model checking, serialization, rendering, services like compare and editing functions on IFC-based models. It provides web services, connections to authoring tools, and visualization through APIs while the models are stored in an IFC-based database. BIMSERVER has been used for projects like the L.A. Metro Westside Subway Extension, checking information inheritance between architectural and supplier data, and generating floor plans.