Assuming you're referring to Defense of the Ancients, it's free, but the game that plays it is not.
Basically, you have to have Warcraft 3, but DOTA itself is free, you just can play it.
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There are a number of places where someone can access a free DotA map. Some website examples include Get DotA, DotA-Utilities, Softpedia and DotA Source.
Steam
Yes.
Steve Feak (AKA Guinsoo),then Eul improved dota,then after.. icefrog is now developing dota
That answer is NO ONE DOTA 3 IS NOT OUT