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UMLet

UMLet - Free UML Tool for Fast UML Diagrams

18 Alternatives To UMLet

Dia

Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.
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Eclipse Papyrus

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.
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Enterprise Architect

Enterprise Architect - UML Design Tools and UML CASE tools for software development | Sparx Systems

Graphviz

Graphviz is open source graph visualization software. It has several main graph layout programs.
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LucidChart

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.

Modelio

Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.

ObjectAid

The ObjectAid UML Explorer is an agile and lightweight code visualization tool for the Eclipse IDE.

PlantText

PlantText is an online tool that quickly generates images from text. Primarily, it is used to generate UML (Unified Modeling Language) diagrams. It is based on a text language called PlantUML.

PlantUML

PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.

Software Ideas Modeler

Lightweight, powerful, easy to use, UML tool
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StarUML

StarUML

UMLGraph

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

Umbrello

Umbrello UML Modeller is a Unified Modelling Language diagram programme for KDE.
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Visio

Simplify and communicate complex information using data-linked diagrams.

Visual Paradigm

Looking for an affordable software with Enterprise Architecture tool, PMBOK tool, UML tool, Agile tool, BPMN tool and UX tool? Read this page for details.

WhiteStarUML

WhiteStarUML is a fork of StarUML with an intent to revive its Delphi code base by updating code to…
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yEd Graph Editor

yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.