From MangaHelpers:
Since their mother's death, sisters Tomoe and Mikage have been mostly raising each other. The older sister, Tomoe, is determined to get good grades and work her way into a good college. However, she's disturbed by the trouble Mikage sometimes gives her. For instance, at the beginning of the manga, Mikage sneakily locks a collar around her older sister's neck, forcing her to go through the day wearing it. Mikage wants Tomoe to think only of her, and her affection may be beyond sisterly love. However, at school, Mikage has made a new female 'friend' that has a serious crush on her. The two sisters have their separate lives at their respective schools, but their life together and their relationship may be most important of all.

Lucrezia, a noble vampire, has come to Japan to seek the supreme blood. However, when she encounters a poor shrine maiden named Inori, Lucrezia might have gotten more than she bargained for.

"Angels' Wings" is a short, all-color manga in which two friends play make-believe. (from Lililicious)

Enthusiastic fujoshi and doujinshi artist Yurina sees yuri everywhere at her all-girls' school... except in the eyes of the best friend who cares for her.

Hime Koibito is about two girls in an all girls boarding school (like so many other shoujo-ai) and an upcoming Christmas eve dance. Karen whose family owns a public bath is in the middle school and asks Nakayama an "outsider" and new student to the high school to go to the dance with her. Nakayama is bullied and shy, but Karen is outgoing and determined to get Nakayama to go to the dance with her....

This oneshot is also reprinted in Petit Peach (Puchimomo, ぷちモモ) published in 2006.

From Seven Seas:

Being a girl is harder than it looks...
For Hazumu, this couldn't be more true, because just the other day, she...was a he.

Shunned by the girl of his dreams, Hazumu loses himself in the mountains and is promptly squashed by an oncoming space ship. The alien inside, feeling guilty, rebuilds Hazumu's body...but as the wrong gender!

Now Hazumu must learn how to be the girl his parents always wanted while dealing with the trials and tribulations of being caught in a love triangle between two girls--his childhood friend, Tomari, and Yasuna, the girl who rejected him but is now strangely attracted to him/her!

[From Lililicious]:

"Kamuko," is a funny, weird, short full-color story.

The 13th and final oneshot from Yuri Tengoku Anthology. "Princess Academy" is about girls who are training to be "illusionists." (from Lililicious)

From Lililicious:

In Pops 2nd, Tsukasa recommends Masami for a position on the Student Council.

(From Tranquil Spring) A comedy version of Simoun.

Slapstick shoujo-ai romantic comedy made special by Hayashiya Shizuru's unique brand of humour; Julia Tachibana, an experienced idol, is infuriated when her boss saddles her with playing 'senpai' to 15-year-old new recruit Ran Asakawa. But the moment she first lays eyes on the tall, cute blonde who is to be her kouhai, all of that changes...

A Yurimm Fairy Tale.

In an apartment, a group of single ladies are living here together. Sae is a manga author and Yuko works in the office. One day, their friend Mayu's rumoured 'boyfriend' was coming to visit and they were peeking from outside of Mayu's room. A series of events happened in their life later make them realise that what they need is not a boyfriend but each other.

Young idol is a lesbian, so gropes and kisses another idol.

1. Hime-chan wa Tereya-san (Bashful Little Hime-chan)
Tsukiko goes after Hime-chan but she got rejected in comedic ways.

1.1. Bashful Little Hime-chan's Summer

1.2. Bashful Little Hime-can's Winter

2. Senpai wa Tokubetsu desu (Senpai Is Special)

3. Kanojo wa Imouto (My Girlfriend Is My Little Sister)
Sentani Miharu, an upperclassman, and Kaburagi Yuyu, an underclassman, have decided to go out with each other. Coincidentally enough, Miharu's and Yuyu's parents got married after that event. Now Miharu tries to fight off the invitations of lust with her new little sister.

4. Tsukiko wa Bakakawa (Tsukiko Is Stupidly Cute)

5. Hakushaku no Okiniiri (The Count's Interest)
When the mysterious "Count" takes interest in a 1st year student she instantly takes possession of her by stealing her first kiss! The 1st year is outraged that the Count would such a thing a tries to avoid her but the Count will not give up on winning her over!

6. Oneechan wa Kanojo (My Sister Is My Girlfriend)
The sequel story to Kanojo wa Imouto.

7. Mikadzuki-san wa Amanojaku (Contradictory Mikadzuki-san)
Maya Mikadzuki-san always says "I hate" to things she actually likes. This confuses Usami-san to no end but she doesn't give-up in befriending Mikadzuki-san!

8. The Ever Bashful Hime-chan
Sequel to Hime-chan wa Tereya-san, Sukiko asks Hime-chan out on a date which involve funny situations.

9. What Happens Next

The 8th oneshot from Yuri Tengoku Anthology. [From Lililicious]: You're Lovelier Than a Rose is a parody about an all-girls school with an underground student council that's a bit... unusual. It makes a few funny references, to things like Marimite and Takarazuka

A bully and her 'monkey'.

From Wings of Yuri:

A high school story about the a love triangle between 2 girls and a boy.

Fuuka likes Riri. Riri likes Itta. Itta likes Fuuka.

This is not a typical love triangle, though!