Human:
Javelin Toss throws a spear to the enemies, if the distance between you and the target is large the damage will be high if you are close the demage will be small.
BushWhack its a trap you can place it on any place if an enemy fall on the trap he will be revealed for some second and he also will receive demage over time.(Tip use this on the bushes to avoid ganks)
Primal Surge heals you or a friend and aplies an efect that increases atackspeed(Tip when you are hiting a tower use it)
Aspect of the Cougar Nidalee transforms into a cougar receiving new abilities.(This abilities are all "No Cost")

Cat:
TakeDown when you activate this skill your next atack will give extra demage, this demage can be aplied on towers.
Pounce when you use this one you just jump to your front if fall into an enemy he will receive demage, this skill is also pretty good to run away.
Swipe its an aoe atack atacks everything at your front.
Aspect of the Cougar transforms you back into an human giving back the old abilities.