No, 7men are not for free. You can use FinalGen (google for it). It can create endgame bases, but only one piece (+ pawns) on each side.
Free 7-Men Piece Endgame Database
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Now it confirms my suspects, that 7-Men Endgame Database aren't free.(Not yet). Thank you both Foenixx and IM pfren.
Actually, i've found a google channel about the 7-Men Databases, with some interesting positions and respective solutions: https://plus.google.com/100454521496393505718/posts
It's very easy to find a free 6-Men Piece Endgame Database(Except 5 vs 1 positions), for instance, http://www.shredderchess.com/online-chess/online-databases/endgame-database
But does anyone knows where i can find a free 7-Men Piece Endgame Database? I mean, is there a website to check it out online, or to download it for free?
Thanks in advance.