I am about to embark on designing multiple OTP applications, each with their own supervision trees (etc.). Being able to share the tree structure is a requirement, so pen/paper is out of the question. What tools are you using to draw out your application structure? Ideally the tool(s) will run on Linux, but for the sake of sharing knowledge, let’s list them all.
Dia is a application I’ve used in the past, and came to me first.
Others?