Rational Software
Rational Software Modeler (RSM), made by IBM's Rational Software division, is a Unified Modeling Language (UML) 2.0-based visual modeling and design tool. Rational Software Modeler is based on the Eclipse open-source software framework and is used for visual modeling and model-driven development (MDD) with UML for creating applications and web services. IBM ceased marketing Rational Software Modeler in 2010 and ended support for it in 2015. Much of the same functionality is now available through Rational Software Architect.