an Open Source BPMN 2.0 / DMN 1.1 Modeler
MDG for Sparx' Enterprise Architect to Create TRAK arch. descriptions
Display NetBeans Module Dependencies
UML diagram editor
A free cross-platform editor for the DRAKON visual language.
Generate railroad diagrams from code or BNF. Generate BNF from code
C++ cross plattform functional block programming
State Machine Diagram Plug-In for Eclipse/CDT
console-mode visual binary diff
A PlantUML editor written in Qt4
Cress is a comprehensive toolset for graphical service/workflow design
A modeling tool for software engineers (OO)
A tool for visualization and analysis of logs as sequence diagrams
A graphical Finite State Machine (FSM) designer.
Mutation System for UML and Variability Models
An Eclipse plug-in for the IBM FileNet P8 Content Engine and CMIS
Uses GraphViz to draw UML class diagrams