: Because the modern app is built on Electron, it is "hackable" using JavaScript. Many users share custom scripts and plugins via GitHub Gists to add specific functionalities or bypass trial restrictions. Feature Comparison: Standard vs. Professional Starting with version 6, StarUML split its features into two tiers: Feature Tier Included Diagrams & Tools Standard UML 2.x, ERD, Flowcharts, Data Flow (DFD), Mindmaps, C4 Model. Professional Everything in Standard + SysML, BPMN, UI Wireframes, AWS/GCP/Azure Cloud Architecture. Community-Driven "Free" Solutions on GitHub For those seeking a truly free, open-source experience similar to StarUML, GitHub hosts several highly-regarded alternatives: WhiteStarUML
| Tool | Description | License | |------|-------------|---------| | | Text-to-diagram UML; integrates with VS Code, docs-as-code workflows | GPL | | draw.io (diagrams.net) | Diagramming with UML shapes; desktop or web | Apache 2.0 | | Gaphor | Lightweight UML modeling for Linux/macOS/Windows | GPL | | UMLet | Fast, sketchy UML tool with Eclipse/standalone versions | GPL | | Modelio | More advanced, supports profiling and BPMN | GPL (Open edition) | | Papyrus | Eclipse-based, very rich UML/SysML | EPL | staruml free github