UModel Alternatives

System Designer is a low code development platform that you can use to create UML-based models.

WhiteStarUML is a fork of StarUML with an intent to revive its Delphi code base by updating code to...

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A Powerful idea processor.It's Open Source and Freeware.

The Topcoder home page has received a slick new makeover that lets new customers quckly login, discover the power of our community, and launch challenges.

SEQO generates UML sequence diagrams from a simple text.

LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.

Yuml.me is a legit modeling tool that comes with the strategic measure that let teams and individual create diagram more quickly via simply typing plain text.

Eclipse Papyrus is an industrial-grade open source Model-Based Engineering tool. Eclipse Papyrus has notably been used successfuly in industrial projects and is the base platform for several industrial modeling tools.

UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.

StarUML

Chrons Web Modeler, now named Olympos, is a collaboration tool that you can use to create UML models and diagrams with features like document, report, and code generator.

Online diagramming application

Open Source

Violet is a UML editor with these benefits: Very easy to learn and use. Draws nice-looking diagrams.