From Meijinification

Matsuka Ryou is a school girl who doesn't seem to take life seriously. She dreams of growing up and becoming a wanderer or a minstrel. She's the adviser and sole member of the light music club (although it's not really a club). However when she picks up a key that a teacher drops, a whole new world is opened up to her...

It is the 18th century in Naples, Italy. There is a girl named Maria living peacefully in the city, but she is more than she appears. She is like a goddess of death, with a sword that cuts through everything. But what exactly is she? Where has she come from and what cruel destiny awaits her?

The story is set in a futuristic and peaceful world made possible thanks to the invention of the Manifestation Engine (示現エンジン Jigen Enjin), a powerful engine that creates energy from the sky and helped to prevent an energy crisis five years prior.
On the island of Izu Ōshima, Akane Isshiki lives a peaceful life with her family. When the world is threatened by an alien force known as the Alone, Akane is given a special key by her grandfather, Kenjirou, which allows her to access the Vivid System and wear a Pallet Suit, granting her special powers. Joined by her friends Aoi, Wakaba and Himawari, Akane fights to protect the world from the Alone.

In a universe where men and women are mortal enemies, Hibiki is captured by a band of female pirates. The group find themselves stranded with a super ship they dub the Nirvana and set out for the female home planet. Along the way, they discover the existence of the "The Harvest" and the possible destruction of both men and women.

The manga differs greatly from the anime, with fewer characters and focusing more on the relationship between Dita and Hibiki.

From MangaHelpers:

There are people in the world who have strengthened their heart and spirit beyond imagination; so much so that they are able to materialize objects just by willing it and its potency is only limited by the users' determination. These people from the far east call themselves the Wazabito and are admired for their power that transcends the physical universe.

Tekuni is a cute Wazabito swordswoman who is traveling the world to train and master her abilities. With her friend Huk-Ro, the owl of knowledge, Tekuni wanders from one danger to another, making friends in the process. [vyc]

— By the author of History's Strongest Disciple Kenichi

From Batoto: Han Narum, a boy who believes small things are the best. A little girl found him. "I found you. My boyfriend." And at the same time he asked "what's that mean?" someone else appeared. What? The robots known as loveroids transform into adults if they receive a loving confession? And the winner of the "loveroid game" in which the loveroids fight will gain 10 billion won?! A light and lively battle comedy, start! Original Webtoon http://www.comicgt.com/WebToon/ComicDetail?comicsIdx=72

Tsuyomaru is a girlish boy while Hazumi is a tomboyish girl. Tsuyomaru is challenged to a fight by a student of another karate school, and while using a training machine operated by Hazumi, something goes wrong and they switch bodies...

Some kind of global catastrophe results in magic working. So now there are wizards, rangers (shape changers), and elf looking people. A remotely posted squad must fight mercenaries equipped with sci-fi technology and magic to find their missing commander.

Working at Kaikarou in the red-light district of Edo Yoshiwara, Ikutarou finds himself among many beautiful women. One in particular, Fuyou, seems to have been gifted with not only beauty but intelligence as well. An intelligence that people from many walks of life secretly turn to when they cannot go to the police. After discovering this secret, Ikutarou is made to be Fuyou's "feet," made to go out to observe crime scenes and evidence to report back to Fuyou so that she may solve the case even while being forbidden from leaving Kaikarou. Will this impromptu partnership work out? Will Fuyou be able to solve the case?

You-Geon, a high school student, is saved from drowning by a mysterious girl his own age. Indeed, this girl is a North Korean agent trained to kill. The encounter which will completely change You-Geon's peaceful life means that this mysterious girl never leaves You-Geon alone for a second worried he might reveal her secret to someone. The atmosphere at the high school will never be the same again...

A gag comedy depicting the everyday life of Komori-chan, a little girl whose laziness knows no bounds.

Official: A pubescent boy's dangerous happenings.Unofficial: Guy gets into a lot of embarrassing, sexually-charged situations in this episodic gag manga.

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Figurine otaku Hitsuji Yamashita gets bullied but tough girl Sakura Sakurai beats anyone that pisses her off and is shrunk to the size of a doll. She has to keep it a secret and Hitsuji helps.

I want to continue to hold sister could not bear. Lost memories and H Love Love Life.

Rally Vincent and Minnie-May Hopkins are two regular American girls. Regular American girls who own a gun shop and might have dabbled in prostitution, respectively. And who happen to be a crack shot and an explosives expert, respectively.

These might be odd skills for American girls, but these two happen to be Chicago's top bounty hunters. Rally can shoot the trigger off a gun from a good distance, and May generally wreaks havoc with explosions and cuteness. And together, with some very useful friends and associates, they make up the Gunsmith Cats.

Burst finds our ladies back at work, back in action, and... back in trouble.

After going through the various events at the Fenrir Far East Branch, Alisa develops a feeling similar to respect for 1st Unit leader, Yuu. Meanwhile, Alisa and Yuu are dispatched to Aegis Island on a protection mission.

When Kanau was a little girl, her father believed she would grow up and marry someone, leaving him behind. He absentlymindedly wished that his daughter would remain little forever and so, at the age of 23, Kanau still has the body of a primary schooler. However, a robot left behind by her father tells her of the 6 caramel dice, which, if gathered, would grant the holder any one wish.

Yoshitaka Nakabayashi, a 14-year-old millionaire who got this huge inheritance after his parents died in an accident, found himself needed to be taken care of and tried to hire live-in maids to do the job.
Two runaway girls, Izumi Sawatari and her younger sister Mitsuki, stumbled into Nakabayashi's mansion and got hired by Yoshitaka immediately, for Yoshitaka is not only a rich boy but also a pervert with uniform fetishes, who wants to be addressed as goshujin-sama (master). Having nowhere else to settle down along with Mitsuki's pet alligator Pochi, Izumi accepted the job reluctantly.