Modelio - Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.
AnyLogic - AnyLogic has changed simulation modeling and expanded its application into complex business environments. The unmatched flexibility of multimethod modeling allows users to capture the complexity of virtually any system, at any level of detail.
Diagramo - Diagramo is an online flowchart software - diagrams (create, edit and share)
FlexSim - Simulation software to model, simulate, predict, and visualize systems in manufacturing, material handling, healthcare, warehousing, mining, etc.
UML Designer - UML Designer provides a set of common diagrams to work with UML 2.5 models.
Simio - Facility design simulation & production scheduling