Just 10? Oh man, this might be a hard meme! I could go on and on, but I'll stop with just one cheat - two heroines from the same author, both whom are amazing. There are so many great heroines and it was hard to pick these, but here they are in no particular order.
Hermoine form Harry Potter
Katsa from Graceling
Katniss from Hunger Games
Rose from Vampire Academy
Bryn from Raised by Wolves
Claire from Morganville Vampires
Cammie from Gallagher Girls and Kat from Heist Society
Tris from Divergent
June from Legend
Alanna from Song of the Lioness