An exercise that someone requested on GFaqs
One Piece
Naruto
Bleach
Zatch Bell
Dragon Ball Z
Dragon Ball
Heroman
Speed Racer
Shigofumi
Bobobo-Bo Bo-bobo
Black Lagoon
Toradora
Fairy Tail
Kaibutsu Ouju
Working!!
Needless
Gungrave
Digimon (First season, I think it was)
Pokemon
The World God Only Knows
Clannad
Clannad: After Story
Tokyo Majin Gakuen
Tokyo Majin Gakuen Season 2
Moetan
Black Cat
Love Hina
Hayate No Gotoku!
Hayate No Gotoku!! (Second Season)
Gintama
Omamori Himari
Soul Eater
Mahou Shoujo Lyrical Nanoha
Mahou Shoujo Lyrical Nanoha A's
Mahou Shoujo Lyrical Nanoha Strikers
Genshiken
K-On!
Code Geass
Tengen Toppa Gurren Lagann
Mitsudomoe
Death Note
Castle In The Sky
Nausicaa of the Valley of the Wind
Yu-Gi-Oh!
Yu-Gi-Oh! GX
Lucky Star
Full Metal Alchemist
Full Metal Alchemist: Brotherhood
Trigun
Yu Yu Hakusho
Inuyasha
IGPX
Blue Dragon
All anime I've seen at least one episode of. This is bigger than I thought it would be.
Of course, I'm not sure this list is comprehensive... yet.