ERD Generation extension developed by Krisztian Kurucz is available in Extension Registry. It supports to generate ER Data Model from database schema. This extension is open source and hosted on Github (https://github.com/kkrisz1/staruml-reverse-db). Thanks to Krisztian.

Protogen extension developed by Pranav Sathyanarayanan is available in Extension Registry. This extension generates protocol buffers based on Entity Relationship Diagrams. This extension is open source and hosted on Github (https://github.com/PranavSathy/staruml-protogen). Thanks to Pranav.

PostgreSQL extension developed by Adrian Andrei is available in Extension Registry. It allows you to generate DDL from ERD model to PostgreSQL DDL. This extension is open source and hosted on Github (https://github.com/adrianandrei-ca/staruml-postgresql). Thanks to Adrian.

TypeScript extension developed by Thomas Min is available in Extension Registry. It allows you to generate code from UML model to TypeScript code. This extension is open source and hosted on Github (https://github.com/yeoupooh/staruml-typescript). Thanks to Thomas.

PanesManager extension developed by David Oudart is available in Extension Registry. It adds two buttons in the statusbar of the interface (bottom bar) to toggle the Sidebar (left pane) and the Navigator (right pane) of the window. This extension is open source and hosted on Github (https://github.com/pixdad/PanesManager). Thanks to David.

DDL (Data Definition Language) generation extension developed by Minkyu Lee is available in Extension Registry. It allows you to generate DDL from a data model (ERD). This extension is open source and hosted on Github (https://github.com/niklauslee/staruml-ddl).

An extension for generating getters and setters developed by Minkyu Lee is available in Extension Registry. It allows you to generate getters and setters for selected attributes or selected classes. This extension is open source and hosted on Github (https://github.com/niklauslee/staruml-gettersetter).

Python extension developed by Minkyu Lee is available in Extension Registry. It allows you to generate code from UML model to Python code. This extension is open source and hosted on Github (https://github.com/niklauslee/staruml-python).

An extension for merging generalizations developed by Minkyu Lee is available in Extension Registry. It allows you to merge generalization views quickly into a rectilinear form as shown in the below figures. This extension is open source and hosted on Github (https://github.com/niklauslee/staruml-merge-generalizations).

Ruby extension developed by Andrias Meisyal is available in Extension Registry. It allows you to generate code from UML model to Ruby code. This extension is open source and hosted on Github (https://github.com/meisyal/staruml-ruby). Thanks to Andrias.