I default to https://www.diagrams.net/ https://www.diagrams.net/. But I've used Microsoft Visio in the past and it's a really nice solution (this was 3 years a

I default to https://www.diagrams.net/ https://www.diagrams.net/. But I've used Microsoft Visio in the past and it's a really nice solution (this was 3 years ago, so it might be better/worse now).