I know there are lots of diagramming tools available.
I like this one as it has no subscription or email association and there is a free no-install Windows version as well as the web one.
The web one like cloud storage.
Exports can be SVG and PDF, useful for vector work in Xara.
Web: https://www.draw.io/
MSW: https://github.com/jgraph/drawio-des...es/tag/v12.1.0 - pick Windows No Installer version.
I mainly use it for dynamic linking and it easily extends to embedding (SVG & IFRAME) and it has a LightBox export.
Acorn