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TheSponge I think by 'Map Creator' he just means someone who's made a map.
But on actual map creating tools.. I think the closest would be
L3DT, which has explicit spring support. Basically l3dt is the only tool I know of that does not require any supplementary tools. It's not open source but I believe the free version only limits size of heightmap (something like 4096x4096 tho, which is way more than enough)
Edit: I take back the free version part, apparently for spring support it'll cost $35
A
google search will bring up a surprising amount of tutorials, tips and ideas for maps