Generate diagrams from textual description
SequencePlugin for IntelliJ IDEA
DBMS supporting graph, document, full-text and geospatial models
an Open Source BPMN 2.0 / DMN 1.1 Modeler
Component, CA, and CCA models; superdense time, DB repo, testing, etc.
Syntax tree editor for rapid annotation of existing text
A Database System for Metamodeling and Method Engineering
https://github.com/citerus/dddsample-core
is low code bpm platform, which is easy to install and easy to use
A cross-platform integrated CASE system
Open-source code generator for Simulink/Stateflow
The Umple Model-Oriented Programming Technology
Modeling tool supporting UML, BPMN and other standards
CAM XML Editor for XML+JSON+Hibernate+SQL Open-XDX sponsored by Oracle
ER Databese Model