This is the base of a hex game, in progress. It has a map builder built in but no load/save yet. You can click to zoom in/out in the upper left, and use the upper right to expand the builder panel. Create a new map, click a tile in the builder panel, and then click anywhere on the map to set the cell. Has hover rendering and selection that calculates move radius and overlays options.
Playing with a hex board and custom game loop. I've got save/load of maps in here but not really robust yet. Haven't pushed board size but it should be able to go pretty large...