I started working the other day on making a map for an island to house 5 tribes, purely for fun. Currently I have a pentagon outline and 5 section borders, and it struck me, that some people might be interested in using that as a base for their own map ideas.
It's not quite perfectly a pentagon, but near enough, I think. Anyway, you can get it from here.
Let me know what you think, if anything. But as I said, nothing much to see, there, yet.