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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.

(You also might want to check out UMLet's sister tool PLOTlet to create chart grids.)

UMLet runs stand-alone or as Eclipse plug-in on Windows, OS X and Linux.

UML 2.3 Design Tool .NET, Java, C++, XSD, DDL, PHP, CORBA, Python & more. Free Trial!

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 diagram.

Quickstart

- Add elements to a UML diagram with a double click
- Edit elements using the lower-right text panel
- Select multiple elements using Ctrl or lasso
- Press 'C' to copy diagram to the system clipboard
- Use +/- or Ctrl+mousewheel to zoom