#1 Smith-morra Gambit
The Smith-Morra Gambit is a chess opening that starts with 1. e4 and is used to counter the SIcilian defense, one of Black's most popular and aggressive openings. The idea: White's idea is to challenge the center right out of the opening, in a very aggressive way.
But there is a lot more that I haven't told you. I will not do it now, but rather in another blog
#2 The bird's opening
The Bird's Opening starts after 1.f4, when White opens with a flank pawn instead of the more traditional center push of the d- or e-pawns. White's strategy consists of controlling the dark squares on the center of the board. The f-pawn controls the e5-square right away, while a future e2-e3 or c2-c3 push will help White to get a grip of the d4-square.
Dutch variation with e3
White can also play e2-e3 instead of g2-g3 in the Dutch Variation. With this setup, White can play a more positional game with an eventual d2-d3 push or go for the Stonewall formation with d2-d4 and c2-c3.
Black may decide to answer the Bird's Opening with the From's Gambit, its most double-edged variation. This line occurs after 1.f4 e5 when Black offers a pawn for quick development. From there, White can play 2.e4 and enter the King's Gambit or accept the challenge and play 2.fxe5, after which the game gets extremely complicated.