AnimeMusicVideos.org

I also liked once and again ^_^, only not as much as these four:

Video: Worlds Unbroken
Anime: Air
Song: Waiting for the World to Fall
Artist: Jars of Clay
Creator: silver_moon, Sierra Lorna
Studio: Dark Moon Studios, Premonition Studios

Video: Reflections
Anime: Kimi Ga Nozomu Eien, Haibane Renmei
Song: Do you know...
Artist: Maksim
Creator: ukms[z]
Studio: kamaz graphics

Video: Here Always
Anime: Ah! My Goddess
Song: Closer
Artist: Joshua Radin
Creator: Nessephanie
Studio: Random Destination Studios

Video: FF8 - Remember Me
Anime: Final Fantasy 8 (VIII)
Song: Letting Go
Artist: Jeremy Camp
Creator: AltruisticCrono
Studio: DZX Productions