The Best 39 UMLet Alternatives

  • astah Community Edition icon

    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...

    Free Windows Linux

  • NClass 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...

    Free Open Source Windows Linux

  • BOUML icon

    BOUML

    BOUML is a free UML 2 tool box (under development) allowing you to specify and generate code in C++, Java, Idl, Php and Python. BOUML runs under Unix/Linux/Solaris...

    Commercial Mac OS X Windows Linux

  • UML Designer icon

    UML Designer

    UML Designer provides a set of common diagrams to work with UML 2.5 models. The intent is to provide an easy way to make the transition from UML to domain specific...

    Free Open Source Mac OS X Windows Linux

  • Classbuilder icon

    Classbuilder

    ClassBuilder is freeware CASE tool targeted at the C++ developer, running on Win2K-XP. It lets you create, manipulate and navigate classes, class relations, class...

    Free Open Source Windows

  • TopCoder UML icon

    TopCoder UML

    TopCoder UML Tool is an easy to use, consistent modeling tool for use in Design and Development competitions. The new tool was built to model sequence, class, use case...

    Free Open Source Mac OS X Windows Linux

  • Chrons Web Modeler icon

    Chrons Web Modeler

    the Chronos Web Modeller is a collaborative tool for the creation of UML models with reporting, code and document generator . CWM offer an holistic MDA/MDD approach...

    Free Open Source Web

  • jsUML2 icon

    jsUML2

    A lightweight HTML5/javascript library for UML 2 diagramming. Alpha software. This project is in progress. Many functionalities are ready to be used. Nevertheless...

    Free Open Source Web JavaScript

  • System Designer icon

    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 OS X Android iPhone Android Tablet Web

  • Modeliosoft icon

    Modeliosoft

    Whether you are a Business Architect, System Architect, Developer, Analyst or Designer, Modeliosoft meets your needs through its high quality solutions for modeling, and...

    Commercial Windows Linux

  • Gaphor icon

    Gaphor

    Gaphor is a Python-based, easy to use modeling environment. This means that you are able to create nice UML diagrams for documentation and to assist you with design...

    Free Open Source Mac OS X Windows Linux

  • ObjectAid icon

    ObjectAid

    The ObjectAid UML Explorer is an agile and lightweight code visualization tool for the Eclipse IDE. It shows your Java source code and libraries in live UML class and...

    Freemium Mac OS X Windows Linux

  • yUML icon

    yUML

    Create and share simple UML diagrams. Beta software. Supported diagram types: class, use case

    Free Web

  • Gravizo icon

    Gravizo

    A simple way of describing graphs and include it easily in your web for free, blog, markdown page, github, and any location where remote images can be showed.

    Free Web Self-Hosted

  • Eclipse Mode Development Tools icon

    Eclipse Mode Development Tools

    The Model Development Tools (MDT) project focuses on big "M" modeling within the Modeling project. Its purpose is twofold: To provide an implementation...

    Free Open Source Mac OS X Windows Linux

  • IBM Rational Rose Enterprise icon

    IBM Rational Rose Enterprise

    Rational Rose is an object-oriented Unified Modeling Language (UML) software design tool intended for visual modeling and component construction of enterprise-level...

    Commercial Windows

  • ckwnc icon

    ckwnc

    ckwnc is a uml sequence diagram creation tool that uses an intuitive c-style language to automatically create uml diagrams that can be saved as an image or embedded...

    Free Open Source Linux Web