For the kind of diagram in your example I have been using Cacoo for some time now: https://cacoo.com https://cacoo.com It does not take a lot of practice to g

For the kind of diagram in your example I have been using Cacoo for some time now: https://cacoo.com https://cacoo.com It does not take a lot of practice to get decent results and they also have some nice networking/AWS icon templates. I think they still have a free account option with limited sheets.