And here's the direct link to the Star Trek Flats Maker (doesn't work for me on the first try, some trickery may be required for Firefox on Linux): http://www.crowstuff.co.uk/trekminis/index.htm
If you want an 'all-paper' solution for basing your flats, you can point your browser to http://onemonk.com/bases
there's a lot of free folding bases, with different textures, sizes and styles.