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Dia is a GNU program for drawing diagrams. It is a versatile diagramming tool with a modular design that allows development of custom shape packages for drawing various kinds of diagrams by writing XML files, and has support for UML diagrams, flowcharts, network diagrams, circuit diagrams, and many more. Dia can export diagrams to a number of formats, including EPS, SVG, PNG, and more. <small>(<a href="/manual/manual.html#dia">doc</a>)</small>