1) Mutants and Masterminds.
2) True20 : I have not yet played it (waiting until cam I get the Companion)
3) d20M provided that Blood and Fists is used for martial arts and, if fx are used, Elements of Magic:Mythic Earth and Psychic's Handbook are used in place of the standard magic and psionics rules).
Edit:
BESM d20: I actually liked it, but I prefer M&M
Iron Heroes: I liked the goal. After seeing Book of Iron Might and hearing how good Iron Heroes was, I checked it out, but I did not like the classes, the umbrella skills, or the tokens.
Castles & Crusades: I saw it, but it just was not what I was looking for.