From Slightly Sarcastic:

Sugawa Raika is a pretty normal second year in high school... except for her unhealthy obsession with good-looking boys. When she meets Tamaki Jun, a boy at her school, she is just as determined and boy-crazy as she's ever been. But Raika has met her match in Jun; he smiles sweetly at her advances, telling her nicely that he is, in fact, not from planet earth!

From MangaHelpers:

Three girls are the only members of the Fortune Telling department at Sakumigaura School where they each pursue their own style of tapping into their energy to find answers.

Hoshikawa Crystal uses her crystal ball while Nano Kari uses meditation and chi and Kaguyama Hime uses ancient spirits. The three are always together and help each other hone into their abilities but never forget to have a great time. [vyc]

A collection of short stories:

- Boku no Hitsugi de Bansan o (Dinner in My Coffin)
On a cold white winter night, a dying vampire shares his last moments with a bitter young lady. Will their encounter change what fate holds in store for them? A silently fading final journey.

- Tasogare Renren (Longing for Dusk)
Kiriko's life changing encounter.

- Shinobigoto (Whispered Things)
High-school student, Chiya, encounters a tragic ghost in a pond.

- Hoshi wa Akatsuki no Kage (The Stars are the Dawn's Shadow)
Aurelia is a peasant girl fleeing an arranged marriage. Mihai is a young lord injured after a suspicious horseback riding accident. How are the two of them connected? And what will happen when they find themselves trapped in an abandoned monastery with some very sinister occupants...?

An alternate universe story starring the yuri couple of "Kannazuki no Miko" and "Kyoushiro no Towa no Sora" fame, Chikane and Himeko.

In this series Himeko is a nun who leds a peaceful but lonely life, having lost both her parents and her beloved older sister.

One day she finds a girl hung inside the church, impaled by a sword. The girl, who strongly resembles Himeko's dead sister, is still alive and calls Himeko's name. She reveals that her name is Chikane, but she has a memory loss about everything else.

From that moment, Himeko starts to be targeted by a group of people who want to obtain the "Dragon Cry", which is said to be hidden inside her body. Chikane (after trying to know Himeko "more intimately") vows to protect her.

Yamanouchi Kouya, the daughter of a famous author, is a shy young girl just starting middle school. She is named class representative along with Kannatsuki Yuuya, a boy she met on her way to school who frightens her a little bit. They are trying to work together, but he always seems mad at her and she is painfully shy. The thing is, Yuuya knows something that Kouya doesn't know yet—that her famous father is going to marry his mother!

Collection of short stories: - Maple Love Two college students become friends, but one of them has fallen for the other.. - Love Letter A girl asks her friend to give a love letter to a boy for her. Too bad she has no idea her friend is in love with her... - Cycling Under a Starlit Sky - Kawaii Anata (Your Cuteness) This is about a boyish girl who doesn't think she's cute, and her love interest, who does. - Winter-tinged Thoughts Shizuru is in love with Matsuri, who in turn is in love with Aya. Oh, dear. - A Lunch Made with Love Retells some of the events of "Winter-Tinged Thoughts" from Izumi (Shizuru's best friend)'s point of view.

From Aerandria Scans:

Edward, the son of baron Lobel, is a spoiled "young master" who knows nothing of the real world and has his head in the clouds. The servants want him to learn how to handle women, so they find for him the perfect woman! She is called "Pearl" and is very cute, but she also has an amazing secret! Also features the one-shot "Yuki no kanon."

Also includes:
Yume Kurai

Kazuya Aki's not very bright, so when the company he works for takes off in the middle of the night, he's left to deal with the creditors. Munekata Kashi is the president of the company that is owed the most money and he has some creative ways for Aki to pay it back. Souichirou Takaba is Kashi's long suffering secretary, but are his intentions toward Aki completely innocent?

Heroine Shikkaku + Hirunaka no Ryuusei crossover (boys version)

From Antisense Scanslations:

Princess May and Prince Kite have been engaged since they were children, and May always believed they would live a happy life together. But when an evil sorceress with a mirror demon (J) and a lust for... well, just about everything, sets her sights on May's kingdom and takes control of her father, everything is put in danger.

From Nakama:

Nakano Atsushi, first-year high-school student who didn't open his heart to anybody except his much-loved older sister, even while thinking of putting together a band, isolated himself. His older sister, worried for the obstinate Atsushi, got the cooperation of her fellow student Takase Yuuichi.
The sound of the guitar played by Takase, who takes part in an indie band, is in tune with Atsushi's heart and he was made prisoner by Takase's invite “I'd like you to sing together with me”, just like a love confession... With a lot of material drawn for the occasion, the wandering of a hazardous love.

From Chibi Manga:
A girl who dreams of fated meetings - Kizuna. The one she met in a suspicious western-style house, the "Yuurei Library", was a good-looking but demon-like young man - Ruu. On top of that, Ruu has an unbelievable secret...! A cursed love hidden in the masterpiece "Romeo and Juliet". Searching for a new ending, the gears of fate have started to move--!?

From Entropy:
A volume of one-shots from the author of Perfect Girl Evolution.

From Covenant of Darkness:

For 10 years Saika has done everything she can to get close to her love Keishi. She followed him to the same high school, joined the same committees, and even changed her outward personality to become the right match for Keishi. One day, looking for Keishi in the special section of the school, she runs into the school's trouble-maker Kirisaki Shin. As he begins to bully her, her true personality comes out: loud-mouthed and violent. To her dismay, Kirisaki decides that he likes that kind of girl. Lovey Dovey is the story of Saika's trials and tribulations in a love triangle at a school where "Love is Prohibited."

An Na mentions to her mother that she wants to go and find her dad, her mom soon decides to leave and go volunteer in South Africa. An Na's mom leaves their store to her half brother Aaron who she feels some resentment for. Now when she finally finds information on the wearabouts of her dad what will happen when the only clue is a kid who won't talk?

Update: After a long hiatus the author finally picked up the series again.

When Fujii Nanami comes across a group of delinquents beating up another boy, her first instinct is to run away. But forgetting what she saw is harder than it seems, and when she goes back to treat his wounds, she finds her fear of him beginning to fade as an unlikely friendship springs up between them...

Ryou Jinnou is the chairman of a big company. Having succeeded his late father very young, he’s bored to death... And he chooses as a hobby the summoning of a demon with which he decides to have fun, whether the demon likes it or not! Ryou and Belial thus form a contract, which states Belial has to grant Ryou three wishes, whatever they may be...

A short sequel for Hana No Mizo Shiru portraying Misaki and Youichi's life after the events of the main plot.

Hundreds of years ago there was a battle of two beings on earth, one who calls themselves the 'Celestials' and another one which is known as the 'Darkseeds'. The Celestials won the battle but hundreds of years later the 'Darkseeds' who calls themselves the Puaka has started to rise again. It will be time before another battle begins. The Celestial king sent his warriors in search of the Puaka King to destroy the Puaka king before he could gather his army and rise against the Celestial King again. The story focuses on two of the warriors, the twin brother and sister Purnama and Suria in their journey to avoid another battle from starting. Inspired from the folklore of Southeast Asia.

1-3) Tsumasaki ni Kourozu
Iwai Arata was recommended by his professor to work part-time under a rather eccentric mycologist, Murota. The mycologist seemed hard to approach at first. But slowly as he got used to Iwai's presence, he became friendlier in his own way, showing Iwai a whole new world and giving him guidance with life. Though every day was fun and exciting, a sense of unease began to creep into Iwai's heart
- from Echochi Scans

4) Lingering Light (Tsumasaki ni Kourozu - Extra)

5) A Fish's Warmth
Hirotaka has a secret. When people fall asleep, he sees fishes swimming out of their bodies, wandering and playing, and going back when they awaken. But, the deeper one's secret is, the more solitary he becomes.

6) Excursion at Midnight (A Fish's Warmth - Extra)

7) August, End of Summer
When Haruhiko's grandfather dies, he stays behind in the old house for the memorial service. Left with regrets of lost time, a mysterious boy, and forty nine days in the countryside, Haruhiko finds himself accepting the oddities and discovering a beautiful place.

8) The Coming of Summer (August, End of Summer - Extra)