you can't really avoid the London. unless you know your opponent is going to play the London. then you can respond 1.d4,c5 and go into some type of Benoni.
there are many defenses to the Queens pawn opening. the real defining factor is what white plays on move 2. the main choices for black are d5, Nf6, and c5. play can go in multiple directions from there.
What do you like to play against the queen's pawn opening? Asking this because I'm looking for a new opening against the London System, Queen's Gambit, etc.