Alternatives to ObjectAid for all platforms with Free License

  • Software Ideas Modeler

    Lightweight, powerful, easy to use, UML tool Software Ideas Modeler is a lightweight and powerful CASE tool. It supports UML 2.2 diagrams and a lot of other ones....

    Free Personal Windows

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  • Diagram Designer

    Simple vector graphics editor for creating flowcharts, UML class diagrams, illustrations and slide shows.

    Free Windows

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  • WhiteStarUML

    WhiteStarUML is a fork of StarUML with an intent to revive its Delphi code base by updating code to recent Delphi editions, reducing dependence on third party components...

    Free Open Source Windows

    WhiteStarUML icon
  • NClass

    NClass is a free tool to easily create UML class diagrams with full C# and Java language support. The user interface is designed to be simple and user-friendly for easy...

    • Discontinued Since 2010

    Free Open Source Windows Linux

    NClass icon
  • Violet UML Editor

    Violet is a UML editor with these benefits: Very easy to learn and use. Draws nice-looking diagrams. Completely free. Cross-platform. Violet is intended for developers...

    Free Open Source Mac Windows Linux

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  • UMLGraph

    UMLGraph allows the declarative specification and drawing of UML class and sequence diagrams. The current features are part of an ongoing effort aiming to provide...

    Free Open Source Mac Windows Linux

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  • astah Community Edition

    Astah Community is an add-on tool for your UML that is ready to use the instant you download it, allowing your UML to be quickly and easily enhanced, and refining your...

    • Discontinued Discontinued from September 2018. Cannot be downloaded anymore.

    Free Windows Linux

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  • System Designer

    Integrated development environment that can help you define models for your applications in a streamlined manner and test the results.

    Free Open Source Mac Web Android iPhone Android Tablet ... iPad GitHub

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Platforms

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