I don't know many good ones. I have a feeling Gary Oak might? Anyway I'll post what I know is good, I think they're all hookups from the RZA that he talks about in his books.
36th Chamber of Shaolin (American title: Master Killer)
Five Deadly Venoms
8 Diagram Pole Fighter
Kung Pao! (probably not actually)
House of Flying Daggers
Crouching Tiger Hidden Dragon
Enter The Dragon
A Touch of Zen
The Prodigal Son
The shitty ones that are fun to watch
Street Fighter (or any Sonny Chiba movie)
Any blaxploitation (i.e. Foxxy Brown, Black Belt Jones, etc.)
Mortal Kombat 1 & 2
Watch them in order of greatness.
The Legend of the Drunken Master
Dragon Tiger Gate
Kill Bill vol1&2
Heroes of the East
Fist of the White Lotus
Kung Fu Hustle
King Of Beggars
Make sure you get to The Protector & Ong- Bak 2 because they are awesome
You cant go wrong with fists of fury or the big boss. Just about any Bruce Lee movie is good but avoid Game of Death 1 and 2 its not really him in those 2. Also Drunken Master with Jackie Chan is excellent.
The Seven Samurai
I always wanted to watch that, but I've never gotten around to it. Speaking of samurai, Have you've ever watched Samurai Champloo? It's an anime, but nonetheless its got awesome action.
Afro Samurai is killer as well.
I second all that Gary Oak said and add:
Fist of Legend
Snake in the Eagle's Shadow
and my personal favorite, Iron Monkey
Iron Monkey's the shit. I couldn't remember the name though.
Kung Fu Panda (This counts, right? It was good...)
Umm well i would say forbidden kingdom. Its not a classic like all the rest mentioned and some of the scenes are kinda corny but a couple of the scenes are pretty neat.