Top Alternatives to WhiteStarUML

Lucidchart is a leading web-based diagramming software that empowers individuals and teams to create complex visual representations of ideas, systems, and processes. It offers extensive shape libraries, real-time collaboration features, and seamless integration with popular productivity tools, making it ideal for flowcharts, UML diagrams, wireframes, and more.

PlantUML is an open-source tool that allows users to generate a wide variety of UML and other diagram types from a simple human-readable text description. It supports sequences, use case, class, activity, component, state, object, deployment, timing diagrams, and more, making it accessible and efficient for technical documentation and visualization.

Umbrello UML Modeller is a comprehensive, free, and open-source UML diagram tool. It provides robust capabilities for creating a wide range of UML and other modeling diagrams, supporting developers and designers in visualizing complex systems.

Enterprise Architect is a comprehensive visual modeling and design tool based on the OMG UML standard, supporting a wide range of modeling disciplines from software design to business process modeling and requirements management.

UMLet is an open-source, Java-based UML modeling tool designed for both educational purposes and rapid creation of UML diagrams. It supports a wide range of diagram types and offers good integration with popular IDEs.

Visual Paradigm is a comprehensive modeling and design tool for software development, enterprise architecture, and business process analysis. It supports a wide range of diagramming notations including UML, BPMN, ERD, and more, facilitating code generation, reverse engineering, and team collaboration.

Software Ideas Modeler is a comprehensive CASE and UML tool designed for creating a wide range of diagrams, facilitating software design, analysis, and documentation. It supports numerous modeling languages and features like code generation, team collaboration, and extensive customization via plugins, making it suitable for various development workflows.

Diagram Designer is a free, lightweight vector graphics editor for creating various diagrams, including flowcharts, UML diagrams, illustrations, and slideshows.

Astah Community Edition is a free, powerful modeling tool supporting a wide range of diagram types beyond just UML, designed for individuals and small teams.

Modelio is a free and open-source modeling tool that supports various standards, including UML, BPMN, and SysML. It offers a comprehensive environment for designing, documenting, and generating code for software and systems.