Sicilian Defense, Dragon Variation, Yugoslav Attack
Another pretty sharp opening for both sides is The SicialianSicilian Dragon, with the Yugoslav AttackYugoslav Attack being one of the sharpest variations. It differs from most of the openings listed here because it's not a gambit, but still a very sharp and dangerous opening with lots of threats for both White and Black.
9. Bc4 being the more aggressive move and
9. O-O-O goes for more tactical play.
[FEN ""] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 (9. O-O-O)