Open ModelSphere is a powerful data, process, and UML modeling software tool. It covers conceptual and logical data modeling as well as physical design and forward and reverse engineering. Open ModelSphere also helps systems analysts to integrate the creation of data flow and business process diagrams and to elaborate an enterprise's workflow and logistics. It provides the functionality of a rich UML modeling tool. You can create Activity, Class, Collaboration, Component, Deployment, Package, Sequence, Statechart, and Use Case diagrams.
Visual Paradigm for UML (VP-UML) is a powerful, cross-platform, and easy-to-use visual UML modeling and CASE tool. It provides software developers with a cutting edge development platform to build quality applications faster, better, and cheaper. It facilitates excellent interoperability with other CASE tools and most of the leading IDEs.