Open-source code generator for Simulink/Stateflow
A free cross-platform editor for the DRAKON visual language.
UML diagram editor
A PlantUML editor written in Qt4
A modeling tool for software engineers (OO)
Free software for generating understandable and accurate fuzzy systems
Code generation from UML to any language (Java, Objective-C, PHP...)
Repository for dependencies between software design artefacts
Java library implementing a state machine by the UML standard.