an Open Source BPMN 2.0 / DMN 1.1 Modeler
MDG for Sparx' Enterprise Architect to Create TRAK arch. descriptions
A free cross-platform editor for the DRAKON visual language.
Fortran library with the Abaqus user material subroutines UMAT/VUMAT
A PlantUML editor written in Qt4
A modeling tool for software engineers (OO)
Prototype editor for the SDEM Mapping Language
XJML 1.0 is a platform for Verification and Validation of Java classes