Free tools for people who work with drawings
Open-source desktop apps for Windows and Linux. No account, no subscription, no telemetry: your files stay on your computer.
KanzonasPDF
PDF markup, measuring and editing for construction and engineering. Calibrated takeoffs, revision clouds, stamps, compare, forms, signatures, redaction and OCR.
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KanzonasCAD
Electrical CAD for people who know AutoCAD but want fewer surprises. Schematics, symbol libraries, wire numbers and cross-references that update themselves.
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