Object-oriented equation-based modelling and optimisation software
The Umple Model-Oriented Programming Technology
Open-source code generator for Simulink/Stateflow
Modeling tool supporting UML, BPMN and other standards
A free cross-platform editor for the DRAKON visual language.
Data Type Definition System
Code generation from UML to any language (Java, Objective-C, PHP...)
A diagram/modeling tool.