Well if you are just looking for games with English translations, then the amount of games you can find is slightly limited, but there is still a decent chunk of good yuri games out there. (Kind of a long post inc )
First off, the SonoHana series has 10 fan translated games and 1 licensed game by Mangagamer.
Fan translated games in order:
Mangagamer's released game:
https://vndb.org/v16263
Sekai Project has a few decent yuri games,
Atom Grrrl!!!
Sacrament of the zodiac
Katahane is probably one of my favorite VNs of all time. It has a lot of yuri, though it's not a pure yurige. The story in it is great, and the romance is really beautiful.
Lillium x Triangle is a cute and light yuri game. (translated by Nosebleed on this forum, so thanks for that )
Nurse Love Addiction is coming soon, and is a rather lengthy all-ages yurige. It seems like a good game, so do look out for that.
A little bit of self promotion, I am currently in the process of translating Tsui Yuri. It's a cute twincest yuri game.
There is Sugar's Delight, a yuri doujin that is actually pretty good all things considered.
I have not yet given it a shot myself, but Highway Blossoms is an OELVN released quite recently by Alienworks and Sekai Project.
Other games to look out for is The Shadows of Pygmalion, currently being translated by Mangagamer. Should be out some time this year hopefully, though there is no ETA yet.
Also, Ne no Kami, which is being translated by Sekai Project. It has an ETA for 2016, so it will hopefully come out soon.
That should be some of the more popular translated yuri titles. Hopefully that helps a bit.