Quote Originally Posted by Lilltiger View Post
I would recommend Inkscape (open source) for things like this, you load the image into a layer and then make a new layer on top of it and use the vector-drawing tools in inkscape to draw the grid.
There is an Inkscape extension that can generate hexes (labeled and unlabeled, with center dots, and without): https://github.com/lifelike/hexmapextension

Project site is here: I Boardgames Extensions

-Rob A>