an Open Source BPMN 2.0 / DMN 1.1 Modeler
Syntax tree editor for rapid annotation of existing text
An editor for the specification of Graphol ontologies
Multidocument automation by templates - for sphinx, mkdocs, epydoc ...
PUed - PlantUML Editor
A free cross-platform editor for the DRAKON visual language.
Combinatorial Interaction Testing Laboratory
UML diagram editor
The markup language for design the programs
Utility for software systems specifications
A PlantUML editor written in Qt4
A Rodin Platform Plug-in for Generic Instantiation
Plugin for MagicDraw to support MBSE with SysML
A graphical editor for PlantUML diagrams.
The HTML 5 JavaScript diagramming library
Prototype editor for the SDEM Mapping Language
An editor for presentation models and presentation interaction models