Yes, Sailor Moon has a canonical lesbian couple in the later seasons (Haruka [Sailor Uranus] and Michiru [Sailor Neptune]). There's also Zoicite/Kunzite in the first season for m/m.

Noir is awesome and everyone should watch it.

Maria-sama ga Miteru has a lot of overt subtext without QUITE going there, with the notable exception of the tragic past relationship between Sei and Shiori (Shiori transferred away, intending to become a nun).

Strawberry Panic is not very deep or particularly engaging, imo, but it has three all-female love triangles.

Kannazuki no Miko is one I haven't seen myself, but it has canon f/f.

Um... Oh! Battle Athletes Victory! A strange anime about an all-girl sports competition... in space. With canon f/f.

I haven't seen Simoun yet, but I've seen people gush about its f/f content.

And I'm sure there are many, many more.