From MangaHelpers:

Yuta is a normal high school boy living in a normal house with his parents, but his cat turned into a beautiful girl. His parents believe that the cat-turned-girl is a god that will bring great fortune to the family. Yuta has now been forced by his parents to marry his cat. Will Yuta be able to accept the fact that his future wife used to be a cat?

Saku Ooyagi returns to his old town after seven years and becomes reacquainted with a childhood friend, the ever-boisterous Mihoshi Akeno; but the reunion is far from merry since his last piece of memory between them is of her falling off a tree and him diving to save her. Regardless, Mihoshi focuses her all into improving their tattered relationship and forces Saku to join her astronomy club.

Basically this manga is about an astronomy club, and slapstick school life comedy as Mihoshi changes Saku's life.

Sequel to Nozo X Kimi. In their second semester of high school, Nozomi and Kimio are in the same class again, still on their quest to help their schoolmates face their own private true-self. Nozo X Kimi migrated from Shonen Sunday S to the much more popular Weekly Shonen Sunday but, instead of being continued from where the previous serialization ended, a second season was started.

From MangaHelpers:

This is a diary-style 4-koma manga that depicts the daily life and observations of the 40-year -old author, who married a 26-year-old Chinese girl. The author immediately states that this manga-style blog was meant to show the quirky and interesting nature of his young wife. He is an extremely stereotypical "otaku" (Japanese nerd), while she is a Chinese girl enjoying and learning the Japanese culture.

1)The World in Your Hand- Natsuo Kanda's not sure who started the rumors about him being gay, but everyone at his office seems to be talking about it. His only consolation is the escort service he hires every month, and the night of pleasure that follows. This month is different, since his escort is newcomer Masachika. Despite being huge, the childish and puppy-like Chika is exactly what Natsuo needs, and even though it's a business relationship he finds himself growing more attached to the younger man...

2)Our New Year's Event- Actor Keita Otoo has managed to get New Year's Eve off, and plans to spend the night making love to his super cool boyfriend Ryouhei Nemuro. Keita's been so busy lately, they've barely had time to see each other. But with a night of wine and romance planned, what could possibly go wrong?

3)Gaka to Gakyou- Writer Aiji Hirakawa has trouble interacting with others, and so only has one friend, Takafumi Shibata, the son of very wealthy parents. While Aiji struggles, Shibata lives a relaxed life, something that annoys Aiji, even as he tries to suppress his feelings. But when he loses his temper and snaps at Shibata, the drunken Shibata pushes him down and...!

4)My Feelings

5)Beautiful Days

Ageha's older sister is getting married. But Ageha, who suffers from an enormous sister complex won't accept it. One day, in order to get Ageha more involved in the wedding preparations, her sister takes her to Velvet Blue Rose, a shop run by Yukari and Mitsu, a two-man team that design and make wedding dresses. Ageha, who's favorite activity is making exquisite purses for her friends, falls in love with the shop immediately. Will Ageha get over her sister complex and lend her support to the wedding? If Yukari has anything to say about it she will!!

This world is full of weird things. Each of them is a knot. And I am the one who will untie all of them, until I found the "key"- the key can save me from this world.Note: Read left to right

From Winter Translations:

It's love at first sight when the princess of industrial development meets the prince of special advance family! A story about first love that gets your heart puzzled and pounding.

Shuuya Inukai is a model student at a high school who one day attracts the attentions of an ojou-sama, Kantori Isuzu, when she realizes that he is bearing, on his forehead, an X-shaped scar...that was also present on her pet dog's forehead...which leads her believe that Shuuya is actually the reincarnation of the said animal. And now Shuuya's days as Isuzu's pet begin.

Lee-Si-Hyun is a friendly normal schoolgirl whose hobby involves a radio program called "The Girl's Teaching Classroom: Viva Love You." She claims to have a mysterious confrontation with an alluring male teacher that she will soon meet. What will this new relationship of theirs become?

Nana Namiya is a 17 years old student who along with her mother runs a little old inn in Saitama, Japan. One day she meets a handsome guy named Andrew Anderson, an English boy interested in renting a room.(This manga is meant to be read from left to right)

The world as we know it was suddenly altered forever when the door for the dimension of the gods and the door of the dimension of the demons suddenly opened up. Ten years later, a boy named Tsuchimi Rin was entrusted with two princesses from those dimensions. Will he be able to keep his sanity while living with his childhood friend Kaede, trying to live a normal school life, and also being a neighbor to both of princesses and their fathers, the mighty dimension Lords? The hearts of those girls are at stake and only Rin has the key to unlock them.

Despite being half-brothers, Robert and Emile met each other just three years ago when they both started working for the Emperor. Robert is the Captain of the Royal Guard despite still being 17, while the younger Emile is a member of the Guard.

But things never go smoothly for the newly-united brothers, because the Emperor is always willing to throw troublesome jobs their way...

In modern-day Japan, only the direct descendants of samurai are allowed to carry swords. In Takahara Ibuki's neighbourhood, rumors have been spreading about Shiroyasha - a mysterious swordsman who is said to attack other swordsmen. Many skilled sword-fighters have converged in the city with the hope of hunting down Shiroyasha.

On his way home from school, Ibuki witnesses a fight involving his classmate, Haruma Kokonoe, who is the strongest swordsman in their kendo club. Intrigued by Kokonoe's skill, he tries to discover more about this mysterious student...

Group of soldiers fighting against aliens after the conquest of the planet Earth.

In the town with a lighthouse, Inuhouzaki, the police patrol division's new recruit, Kurumi, and the talking middle-aged police-car-dog No.1 are on the case. Everyday, they somewhat protect the peace of Inuhouzaki, but is it okay to leave it up to the rambunctious duo. The new sensation that is the cute, slice-of-life short comedy is here.

Summary: "If i were to become a guy, then i would never make a girl cry!" Said Jun, who just had a break up with her boyfriend. "Then why not become one?" An old woman told Jun... which startled her. Note: As of December 2011, the series is now being officially published by Oh-no!Manga (in the Philippines) and is not an OEL anymore.

Alto has always been followed by misfortune and his problems show no sign of coming to an end when he is suddenly kidnapped by pirates. He learns from them that the clover shaped mark on his body proves that he is the descendant of a legendary pirate. Finding the individuals who possess the spade, diamond, club and heart marks is said to lead the way to valuable pirate treasure.

Web manga about a misunderstood, intimidating koala in a school for humans and anthopomorphic creatures alike.

A young man who enters a lost world where all anyone knows is fighting! Starting at level 1, He works his way up to become a great Player Killer in "The Wilderness".. A place where anything goes and warriors battle for loot, glory or simply just to kill! In The Wilderness , You'll encounter strong and experienced Swordsmen, Archers, Mages and many more classes of warrior! So make sure you train on plenty of Goblins before entering and level up!