From Kirei Cake:

Various short 4koma scenes about five girls, Shinobu, Alice, Karen, Youko, and Aya, all attending the same school together. The main idea behind all of the scenes are that the two English girls, Alice and Karen (Alice is pure English, while Karen is half-English, half-Japanese), are trying to live in Japan and are trying to learn their culture and language!

"I made wonderful friends!"

Clumsy Arashiyama is a girl with a love for mysteries and a knack for getting into trouble. She works for an old lady’s lackluster maid café in a small shopping district. The cafe is largely unsuccessful in attracting customers aside from Sanada, a regular and one of Arashiyama's classmates (who has a secret crush on her). One day Arashiyama’s clever friend Tatsuno is invited to the café, and, upon seeing the miserable state of things (and Sanada, whom she has a secret crush on), decides to work there. Don’t miss the crazy antics of Arashiyama and friends, mismatched love stories, and all the hilarity that is created as a result, in Sore Machi.

The story of a demon and a girl trying to become a demon no matter what the cost.

When Makita Maki, Hasebe Kokoa, and Tachibana Rinka are hit by a truck, they're transported to an unknown location. After fooling around, they eventually figure out that they're in another world. With their phones still connected to Twitter, now they must try and live in this fantasy world.

Yamada is a castaway on an island without any ships passing by and he is unable to recall why he is there. After finding his sports bag, he assumes he was on a school trip. With only seven days worth of food, he eventually decides to make a boat to leave the island. He thought he was alone on the island until finding a girl named Imaise Chika eating his food. They then decide to continue carving the boat together. Since the boat only has room for one, Yamada decides to set off for help, but returns upon noticing that not only has Imaise put her share of rations in his bag, they are mostly untouched as well. After returning, he notices she made the oar out of a fishing lance and he decides they can live on the island longer.

From JManga:

The Life of Akechi Mitsuhide — The trials and aspirations of a man who serves in the shadow of a great leader, Oda Nobunaga, like a moon that mirrors a blazing sun. But what happens when an incident at Hongan-ji leads to a change of heart in Mitsuhide? A long-running historical drama portrayed in fine detail.

The straight-laced Tatsumi has accepted a new job as a teacher on a small island around the Ogasawara Archipelago named "Aoshima," where he encounters unfathomable phenomena that defy all logic. This warm fantasy tale is evocative of nature, in all its mystery and wonder. But is this enchanting isle of blue welcoming him, or......? The island calls out to you, ushering you to a realm on the flipside of the senses. Come enjoy a moment's little miracle in a place where "common sense" holds little sway!

Kasumi, a high school graduate who entered a dark-side company 3 years ago was in the midst of a late night overtime for the 30th day in a row when she wished that she could have "a single day off" to the shooting star she was watching on the roof when suddenly she was swallowed by a mysterious light...... The next thing she knew, she was standing, waiting to be introduced to her new colleagues at "White Products"! Will Kasumi be able to get used to the culture of the light side of business after thinking that the dark side's dealings are "normal"?

A tale of two siblings—one unconventional, the other harboring a great secret.

Welcome to the future of vast bio-constructed cities with crime so severe that the cops drive tanks! For top tank-cop Leona Ozaki (and her trusty tank, Bonaparte), the day-to-day is a tall order already, but when the villainous and sexy (and super-powered androids!) Puma sisters become duly deputized officers of the law and are assigned to "help" Leona catch Urushi-Maru, "The Skyscraper Pirate," things are bound to get out of hand, especially in the midst of a full-on, tank-on-tank streetfight between Leona and a corrupt arms manufacturer bent on getting the city's police tank contract!

It all started with the sound of an insect...out of the blue they became feral. Women infected with this sound became known as the "crazies" who infect other women and attack men exclusively. The resulting chaos devastated Japans populations as 70 percent perished, forcing the international community to cut off Japan from the rest of the world.

Under the Rose contains two stories:

Winter's Tale (Fuyu no Monogatari):
In the late 19th century England, Grace King was the daughter of a declined Marquis and also the mistress of Count Arthur Roland. After her mysterious death, her sons Linus and Lawrence were taken under custody of their father Earl Roland, who has a sick wife Anna and other children. Linus deeply suspects that the Roland family was involved in the death of his mother and thus begins his lonely investigation.

Spring's Paean (Haru no Sanka):
Rachel Brennan was hired by the Roland family as the governess for the children. The children, except the second son William, gradually began to like her. Will William also open up to Rachel too with her efforts?

Masako just lost her mom. While walking around looking for new specimens for her hobby, she comes across what appears to be an unconscious merboy. As she approaches him, he calls out to her: "Mother..." She resolves to take care of him and brought him home. A coming-of-age story.

The story could basically be split into two halves. The main story is about Tamai Shiina, who is an energetic middle-school teenage girl. She visits her grandparent's over the summer where she runs into a very strange creature. Shiina has had lots of strange dreams as of late and also when she was younger, and this strange creature is somewhat related to her visions. She names the small cuddly star-shaped creature, Hoshimaru.

Little did she know that this cuddly creature is really part of herself. After her vacation, Shiina goes back to her home, living with her father. She runs into other children with similar creatures the following days. However, these children have developed their creatures, and they have complete control over them. They mostly use these creatures for their own destructive pleasure and not for good. There is a group of teenagers that all have these strange creatures, and they plan to basically conquer the world, creating a utopia of whatever they desire. Will they succeed? Will Shiina ever develop Hoshimaru?

Another Seven stories adapted from the horror of Hokazono Masaya.

This is a continuation of it's prequel, Aka Ihon.

Unknown beings across from the city’s neon lights, preying on you. Do not fear. There is the Beast!

A story about a baseball player who has an inferiority complex.
His life isn't exactly smooth due to his indecisiveness and lack of raw talent.

"I won't forgive erotic specters!"

Chihiro Tamanoe uses his grandfather's power and clears them up. But he is somehow involved in erotic troubles every time.

A a variety of oneshot stories related to the supposed end of the world in 2012.

5) Nature-0 by HEE-JUNG Baek
Resource depletion, environmental contamination, desertification, and foolish wars. Mankind willingly walked along the path of annihilation. And at the end of that path, those who survived relied on the power of science and conducted endless experiments to obtain the valuable source of life. As scientists are exploring the desert's fallout areas, a child-like being is found naked on the ground and was brought into an underground survival refuge. As they analyze the child, what will they discover?

8) Myum-Myum by currygom
The world is in an uproar over the discovery of a stone tablet thought to have been created 500 years ago.
The stone contains predictions of major incidents that happened worldwide in the last 500 years. All of its prophecies had already come true. There is only one prophecy recorded on the stone that pertains to the future ahead: that the world will end in a year?s time, and only those who believe in the god drawn on the stone will find salvation.
The name of this god is... Myum-Myum.

13) If the World Ends, That's Cool! by Rangto
Friday the 24th, August 2012.
The world will end due to a meteorite crash... tomorrow. But people are fine with it. No one is screaming. No one is praying. Because they are all... cool.