This is a recent addition to Vexlio which I think the HN crowd may find interesting or useful.

TL;DR: easy creation of interactive diagrams, meaning diagrams that have mouse click/hover hooks that you can use to display pop-up content. The end result can be shared with a no-sign-in-required web link.

My thought is that this is useful for system docs, onboarding or user guides, presentations, etc. Anything where there is a high-level view that should remain uncluttered + important metadata or details that still need to be available somewhere.

You can try it out without signing up for anything, just launch the app here (https://app.vexlio.com/), create a shape, select it with the main pointer tool and then click "Add popup" on the context toolbar.

I'd be grateful for any and all feedback!