The best open source UML Modeling alternative to yEd Graph Editor is LibreOffice - Draw. If that doesn't suit you, our users have ranked more than 100 alternatives to yEd Graph Editor and 11 are open source UML Modeling Tools so hopefully you can find a suitable replacement. Other interesting open source UML Modeling Tool alternatives to yEd Graph Editor are PlantUML, Mermaid, Gaphor and Umbrello.
Draw lets you produce anything from a quick sketch to a complex plan, and gives you the means to communicate with graphics and diagrams. With a maximum page size of 300cm by 300cm, Draw is a an excellent package for producing technical drawings, general posters, and much else.
PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams. The generator can be run anywhere within JVM and integrated with various application such as wiki, text editor, IDE, programming language, documentation generator, and others.
Ever wanted to simplify documentation and avoid heavy tools like Visio when explaining your code? This is why mermaid was born, a simple markdown-like script language for generating flowcharts, Gantt charts and sequence diagrams from text via JavaScript.
Gaphor is a WYSIWYG (What You See Is What You Get) UML and SysML modeling environment easy to use that will help you create your applications.
Umbrello is a Unified Modelling Language (UML) modelling tool and code generator. It can create diagrams of software and other systems in the industry-standard UML format, and can also generate code from UML diagrams in a variety of programming languages.
Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI. It allows to draw all UML2 diagrams and specific diagrams for business process modeling. It is easy and powerful with the capacity to add new functionalities to the application.
A daily drawing tool that supports low code for learning or office use. It can be used for flowchart, mind map, UML diagram, ER diagram, network topology diagram, BPMN, Venn diagram, database model diagram, whiteboard drawing, infinite canvas, and more.
ZenUML is a tool generating sequence diagrams from markup text. You can write Java-like code and it generate diagram from it.
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 support for all types UML diagrams.
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