dia: dia (diagram creation program) dia: dia: Dia is an application for creating technical diagrams. Its interface dia: and features are loosely patterned after the Windows program Visio. dia: Its features include multiple-page printing, export to many formats dia: and the ability to use custom shapes created by the user as simple dia: XML descriptions. Dia is useful for drawing UML diagrams, network dia: maps and flowcharts. dia: dia: Homepage: https://wiki.gnome.org/Apps/Dia/ dia: