also, in terms of jutsus.....there are..

taijutsu = hand to hand combat
genjutsu = illusions
ninjutsu = pretty much anything else (fire, summons, kage bunshin....)

there are also advanced bloodlines, special abilities passed down genetically within certain clans (like kimimaro's bone ability)

then there's the curse seals, those black marks that orochimaru gives to his minions, which increase a person's abilities greatly, but wears on their body.

then there's also demon seals.....where a demon is actually sealed into a person's body. Both Naruto and Gaara have demons sealed inside them, and these tend to provide the greatest amount of power of all, if a person can control those demon powers, anyway.