I'm not sure if this is on topic here, but it's not exactly against the rules in the Help Centre so I'll give it a shot.
I want to create a few simple 2D vector images like floor plans or furniture diagrams with some measure arrows on sides etc. When I'm done, I'd like to put them on the web, which means exporting to PNG or better yet - SVG.
The last time I did something like that was 15 years ago and then I used Microsoft Visio. It wasn't great, but usable. However I don't have access to it anymore and I think there should be better free tools today anyway.
I tried using OpenOffice Draw, and I did make something, but it was pretty much a pain and I feel like the UI for doing it could have been a LOT better. In addition, the PNG/SVG export results leave a lot to be desired. Perhaps Draw simply isn't meant for this kind of work.
So - what would be a good free tool for creating such diagrams?