Dia
Dia is a free, open-source, general purpose diagramming software. Dia can be used to create objects and drawing like flowcharts, network diagrams, circuit diagrams, and more. Dia can also export diagrams into many different file formats.
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1 Dia Creative Diagram
2 Dia Installation on Windows
3 Dia Installation on Ubuntu
4 Using Layers in Dia
5 Flowcharts
6 The Dia Toolbox
7 The Dia Menu
8 Dia
9 Saving and Exporting