The ability to link diagrams to external data sources like Excel or SQL Server.
Stencils and shapes that "snapped" together, making it easy to create organized layouts. microsoft office visio 2003 free portable download
If you only need to view old files, Microsoft provides a free viewer that is safe and compatible with modern Windows versions. Conclusion The ability to link diagrams to external data
A completely free, open-source tool that works in your browser or as a desktop app. It is arguably the best "portable" alternative available today. microsoft office visio 2003 free portable download