Originally Posted by Lord Faff
Udyr, Lee Sin, and Amumu are some of the easiest to learn, reliable junglers coming into season three.
With the recent Udyr buff, the guy is a beast. He hardly feels the jungle mobs through all that armor and shielding. You can start doran's blade and with his 1.5 AD ratio on tiger strike and proper tiger priming you can melt someone.
Amumu got a little nerf, but he's still probably the strongest champion in the game. That nerf did very little on the whole.
Lee Sin, again the nerf was minimal, very very solid still.
Amumu and Lee have those monster skill shot gap closers. They allow you to use a lot of unique gank paths and allow you to jump walls to clear the jungle really fast. They also can be used to help you escape when invading.