Lets say I wish to put together some various kinds of servers that interact with one another with possible clustering. I have three "actors": general admins, developers, and the users the developers are developing for.
Are there any tools (free would be nice) that are for this particular purpose?
I've been trying to do it by adapting StarUML to my situation, but it feels like "using an English wrench on a metric bolt."
I'm looking for something a little more powerful than a drawing tool like Visio.