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Design & ValidateToolOpen sourceFree
Dia
A classic open desktop diagram editor with flowchart, UML, network, and circuit shape sets, extensible XML shapes, and multiple export formats.
Visit official siteContent record updated Aug 1, 2026Official site reached automatically · Checked Aug 3, 2026
Why it’s here
It remains useful on restricted networks or older hardware for technical flows and level-dependency diagrams without cloud accounts.
Best fit
Prototype systems, stories, and interactions, then validate them with real players.
technical-designdocumentation
Before you commit
The interface and interaction model are traditional and collaboration is file-based; complex modern architecture or presentation-polished diagrams may need another tool.
