UMLet

Free UML Tool for Fast UML Diagrams

UML tool · umlet.com

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What UMLet’s own pages say

What it says it doesFree UML Tool for Fast UML Diagrams umlet.com
PlatformsLinux, Windows, macOS umlet.com
IntegrationsEclipse, Visual Studio Code umlet.com
Free planYes umlet.com
Open sourceYes umlet.com
License2001+ :: GNU GPL 3.0 umlet.com
Models supportedactivity diagrams, class diagrams, deployment diagrams, sequence diagrams, state diagrams, use case diagrams umlet.com

Each value is a quote AirStack found on the product’s own pages, read 2026-11-05. A missing field means AirStack has not found it on its pages.