.UML

.UML file extension

This is the basic program to work with .UML extension

StarUML

StarUMLStarUML Project

StarUML is a fully fledged, open source, UML modeling tool that supports the ability to create software designs, from basic concepts, through to the coded solution. User should beware that this tool is more complex than a simple UML diagram editing tool, in that, through the use of the Model Drive Architecture (MDA) standard, the tool supports complex modeling which is realizable in code... (more)

The program works with the following extensions: uml

.UML extension is also supported by the following programs:

WinDev

WinDevWinDev/WebDev UML Model

Via its full integration easily develop major projects in Windows.
Visual UML

Visual UMLMySQL Tools for

You can migrate your projects to Visual Paradigm for UML.