Shoujo Sect is a hentai. Don't expect a story, it's just smut.
Strawberry Panic! - it's the best yuri anime out there and is #2 in my top 5 for animes overall.
Candy Boy - another one of the best yuri animes out there.
Simoun - it's disappointing as a yuri even though it has heavy yuri elments, but it's a pretty good anime once you get past the first 2 episodes (disappointing as yuri because it's implied a relationship can only work if one of the girls becomes a man later in their life)
Maria-sama ga Miteru - it's a shoujo-ai and not a yuri. Nothing ever happens in it. It's like an unrequited girlcrush pretty much; if you'd enjoy that then have at it!
Kuttsukiboshi
Kämpfer - it's sort of yuri in a way... it's a genderswap though, not a true yuri
Kashimashi: Girl Meets Girl - a genderswap but I think it'll do the trick
