Microsoft Office Visio, Lucidchart, Mermaid, Enterprise Architect, Visual Paradigm, PlantUML, yEd Graph Editor, IBM Rational Software Architect, ArgoUML, Diagram Designer, WhiteStarUML, astah Community Edition, Umbrello, Yakindu Statechart Tools, ObjectAid, UML Designer, SequenceDiagram.org, Violet UML Editor, js-sequence-diagrams, MagicDraw, WebSequenceDiagrams, BOUML, Software Ideas Modeler, Swimlanes.io, GenMyModel, Papyrus UML, UMLGraph, UModel, Gravizo, Eclipse Mode Development Tools, jsUML2, Poseidon for UML, ClickCharts, System Designer, TopCoder UML, Telerik RadDiagram for WinForms, WPF, ASP.Net, Chrons Web Modeler, Classbuilder, Syngraph.me, ckwnc, SEQO, yUML are some alternatives to StarUML.