Heroines that kick bootie

Anime/manga wanted: Any series where the heroines kick butt
Anime or Manga? Both
Genre(s): Any (slice of life, action, shoujo, romance, all that good stuff)
Language(s): Japanese with English subbed or English dubbed
Special Details:
Plot: Girls kick butt and often
Character(s): Female main character
Producer(s): None
Aired: None
Duration: None
Other: None

Anime/Manga preferences No sad endings
Genre(s): Slice of life, action, shoujo, romance, and all that good stuff
Favourite anime & manga: Kekkaishi and Hana Kimi

Prefer that it's available easily online or in bookstores in America.

Here's what I've found:

~Chrono Crusade
~The Record of a Fallen Vampire
~Vampire Game
~Spice and Wolf
~Claymore

And here are some topics on that might help you:

Tomboy girl with strong personality
Shoujo with strong heroine
Tomboy heroines

As genten mentioned Claymore would be nice though it has a pretty sad ending and it's more like a shounen full of chicks :P i haven't heard about the rest she mentioned but claymore is very nice :D

Moribito

Gintama (its Genre is flawed it changes a lot for some reason its awesome ^^;)
MÄR
& Slayers