Dia
Structured diagram editor for flowcharts, ER diagrams, network maps, and UML-style shapes with export to many formats.
Why it is included
Long-standing GNOME-era tool still useful for quick technical diagrams offline.
Best for
Engineers and students documenting architectures without a SaaS account.
Strengths
- Shape libraries
- Simple canvas
- Export options
Limitations
- Visual style dated vs modern SaaS diagram tools
Good alternatives
Inkscape · draw.io self-hosted
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