I came across this the other day. It's a map editor for Rackham games. You can download the main program from the 1st link, and there are extra tiles from the second two links.
Once you've downloaded the first file and insalled it, go into the program and click Packs then Add and click on the other two zip fils to add those tiles in.
Once you're done, you can save it in a png file (like a jpeg I guess). It could be used to make some printable game surfaces in a hurry for both fantasy and sci-fi games.
Oh, the program is in french! Just click on the mapeditor.cfg file, open it with notepad, and change the fr to en to get it to english is all.
I've only played around a little with it, but it seems kind of cool (probably a little better for sci-fi tiles then fantasy). Some quick 8x11 sheets and you've got a gaming surface.