Let's see...

Normally I would just go find another thread I answered as this has come up oh so many times, but it's faster just to throw 'em out there.

So let's see...

Slayers
Genshiken
Samurai X (and to a lesser degree Rurouni Kenshin)
.Hack//Sign
Tsubasa Reservoir Chronicle
Bleach
Full Metal Alchemist

There are certainly others, but I'm too lazy to list more.