Extensions Registry

You can install community developed extensions

Java code generation and reverse engineering.
C# code generation and reverse engineering.
C++ code generation and reverse engineering.
XMI (XML Metadata Interchange) Import and Export. (XMI 2.1 and UML 2.0)
Ruby code generation.
Quickly merge generalizations into a rectilinear form
Python code generation.
Generate getters and setters for selected attributes or selected classes
Generate DDL (Data Definition Language) from ERD
Generate Postgresql DDL from ERD
If it's present, navigates to the diagram connected to an element
GraphQL IDL schema generation for StarUML
ERD Generation Extension for StarUML
Copy into clipboard the names of the selected elements in the diagram.
Django models code generator
The Rebel is an advanced Java code generator. It enables modeling and code generation for Java Persistence API/Hibernate, Spring, Spring Data and Jackson. Besides other features, it preserves your changes to the generated source code.
PHP code generation. At the moment a bit buggy probably. Just open new issues with your behavior and your .mdj file and I'll fix it.
TypeScript code generation
Implementation of UML to API generator in accordance with https://edi3.org/uml-profile/.
Creates a link between StarUML and the Visual Studio Code editor, to allow quick navigation to files
Reindex the id fields in Requirement heirarchy
An extension for StarUML to generate C# .NET Core Entity files
Color managment