I wanted to create a quick diagram of my home network that other and was stuck on how to do it. We use Microsoft Vision at work, but I can’t afford to to purchase it just for a simple diagram now and again.
So I did a quick search on the internet and came up with a site called Gliffy
They use the common free/basic features and paid/premium features model, and if you are only planning to do the one quick diagram and don’t need to save it, then you don’t even need to register.
It’s a pretty simply site to use, assuming you’re somewhat familiar with a Visio or Visio like program I guess.
They have a basic but useful list of templates/models to use.
Check it out at http://www.gliffy.com