I can't guarantee that I'll remember them all because some none of them are here. (I'm in the process of moving from my old house - the one I'm sitting at now - to a new house - where my manga are.)
Rurouni Kenshin - 1 - 10
Tsubasa Chronicles - 1 -12
MAR - 1 - 15 (complete)
.hack//G.U.+ - 1 - 3
Pixie Pop - 1 - 4 (I think this one is complete)
Inu-Yasha - 1 - 11
Ouran High School Host Club - 1
Tail of the Moon - 1
Full Moon O Sagashite - 2
And I know I have some others, but I can't remember the titles.
I have numerous volumes of Shonen Jump laying around my room, too.