• UMLet

    Free Windows Website

    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.

    UMLet is a UML tool aimed at providing a fast way of creating UML diagrams. UML elements are modified using text input instead of pop-up dialogs. Elements can be modified and used as templates; this way, users can easily tailor UMLet to their modeling needs. UMLet supports a variety of UML diagram types: class diagrams, use case diagrams, sequence diagrams, state diagrams, deployment diagrams, activity diagrams


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  • blockdiag

    Free Mac Windows Linux Website

    blockdiag and its family generate diagram images from simply text file.


    Supports many types of diagrams
    block diagram (w/ blockdiag)
    sequence diagram (w/ seqdiag)
    activity diagram (w/ actdiag)
    logical network diagram (w/ nwdiag)

    Generates beautiful diagram images from simple text format (similar to Small Graphviz iconGraphviz ’s DOT format)

    Layouts diagram elements automatically

    Embeds to many documentations; Sphinx, Trac, Redmine and some wikis


  • LibreOffice - Draw

    Free Mac Windows Linux BSD Website

    Powerful vector graphics editor for the office with tools for easily creating charts, diagrams, brochures and more.


    LibreOffice - Draw icon

    Free Mac Windows Linux Web Chrome OS ... Self-Hosted Website (previously is a free online diagram drawing application for workflow, BPM, org charts, UML, ER, network diagrams. No login or registration are required and features include the ability to save locally (including SVG), a range of stencils, .vsdx, Lucidchart and Gliffy import and real time diagram sharing.

  • Freeplane

    Free Mac Windows Linux BSD Java Website

    Extensible, multi-platform mind mapping creation, analysis and presentation software.


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  • Dia

    Free Mac Windows Linux FreeBSD ... Xfce DragonFly BSD NetBSD OpenBSD Website

    Dia is a GTK+ based diagram creation program for Linux, Unix, Mac OS X and Windows released under the GPL license.

    Dia is roughly inspired by the commercial Windows program Small Microsoft Office Visio iconMicrosoft Office Visio, though more geared towards informal diagrams for casual use. It can be used to draw many different kinds of diagrams. It currently has special objects to help draw entity relationship diagrams, UML diagrams, flowcharts, network diagrams, and many other diagrams. It is also possible to add support for new shapes by writing simple XML files, using a subset of SVG to draw the shape.


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  • mermaid

    Free Mac Windows Linux Web Self-Hosted ... JavaScript Node.JS Website

    An easy tool for generating diagrams and flowcharts from text in a similar manner as markdown.


  • PlantUML

    Free Mac Windows Linux Web Android ... Chrome OS Website

    Open-source, Java-based UML diagram maker using plain text descriptions to draw models.


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