- Denen / Ashita he no Yuuki / Yakusoku no Asa ni / etc ('Door to Another World' melody pieces)
Simoun, Toshihiko Sahashi
- Adieu
Cowboy Bebop, Yoko Kanno/Emily Bindiger
- Kira, Just as He Pleases / Justice and Freedom
Gundam Seed Destiny/Seed, Toshihiko Sahashi
- Suppuration-Core-
Kannazuki no Miko, KOTOKO
- Fake Wings / Aura
.Hack//Sign, Yuki Kajiura/(Emily Bindiger sings the first... Though, actually I'm not sure if she or Yuriko Kaida performs the latter)
- Sentou Kuuiki
Eureka Seven, Sato Naoki
- Kannazuki no Miko
Kannazuki no Miko, Nami Kuboto
- Shangri-la
Noein, Hikaru Nanase
- Heaven's Not Enough
Wolf's Rain, Yoko Kanno/Steve Conte
- The Beast II
Evangelion, Shiro Sagisu
And that's about it ^^; I'm sure there's a few things I'm forgetting... If you want to count them, then basically any of The Pillows' material that got used in FLCL... and then basically everything Toshihiko Sahashi did on the Simoun OSTs are pure gold, along with a lot of other things of Yoko Kanno and Yuki Kajiura's work.