Part of the free LibreOffice suite, this is a capable desktop alternative for basic technical drawing. Conclusion
Microsoft offers a low-cost, web-based version of Visio that provides the essential tools for a small monthly fee, ensuring you are always legal and secure. Part of the free LibreOffice suite, this is
A popular web-based diagramming tool that offers a robust free tier and is highly compatible with Visio files. Part of the free LibreOffice suite