The Best 30 Classbuilder Alternatives

  • StarUML

    StarUML is a program to develop fast, flexible, extensible, featureful, and freely-available UML/MDA platform running on Win32 platform.

    Commercial Mac OS X Windows Linux

  • Umbrello

    Umbrello UML Modeller is a Unified Modelling Language diagram programme for KDE. UML allows you to create diagrams of software and other systems in a standard format.

    Free Open Source Mac OS X Windows Linux

  • UMLet

    UMLet is an open-source UML tool with a simple user interface: draw UML diagrams fast, export diagrams to eps, pdf, jpg, svg, and clipboard, share diagrams using Eclipse, and create new, custom UML elements.

    Free Open Source Windows

  • 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. Software Ideas Modeler is freeware (for non-commercial use).

    Free Personal Windows

  • ProcessOn

    Free html-5 based on-line diagrams design, an ideal tool for visual communication .

    Free Mac OS X Windows Linux Chrome OS Web

  • 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

  • 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

  • Papyrus UML

    graphical modelling open source uml2 tool based on eclipse environment.

    Free Open Source Mac OS X Windows Linux Eclipse

  • 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 OS X Windows Linux

  • 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 OS X Windows Linux

  • PlantText

    PlantUML based on-line UML editor (text to UML) with optional Google registration and document saving.

    Free Web

  • 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

  • MockupTiger

    MockupTiger is a web based application that helps you to build fluid wireframes, mockups or prototypes for your next web application or desktop software. It has a...

    Commercial Windows Linux Android iPhone Web