Not sure if this is really computer science but its language agnostic.
Any suggestions for a relational diagram type tool for linux. I currently use dia for some flow diagrams but I frequently like to represent things with several boxes which representing components within a bigger box representing something else. At the moment I fall back to my old favourite of xfig which is a little slow.
It needs to be quick and easy I'm a sketcher do, redo, re-sketch person. This is less of formal thing more to show general relationships between components. I've tried UML but find it over the top, my flow charts and architectural box seem to get the point across when discussing thing but it would be nice to have a copy on file that is better than a camera phone picture and easier to edit!
The diagram here is pretty close to what I do by hand: