This may be an unusual entry but I had a hard time coming up with this for myself so I decided to add it:
http://mojobob.com/roleplay/props/mapping.html
Nested hex is essential for working out sandbox style campaigns and this is the first I have found for roughing out areas to build later with a pro tool or even just for your own personal campaign. My eyes are going, I may be blind, but it took a bit of searching to find these and time is precious.
Enjoy! :)
