From DMP:
Tomonori Ozawa has just landed a job at a large publishing firm. The only catch is, he is the new editor of a Boy’s Love magazine?! On top of that, he is stuck with dealing with the artist Sakurako Kakyoin, a male yaoi artist who is notorious for missing his deadlines. To become a full fledged editor, Tomonori-kun has to start from the bottom – checking drafts, editing scripts and lettering. Now if only Kakyoin-sensei would stop sexually harassing him, he could actually get some work done!

A new twist on the "love doll" genre. Tempted by an internet advertisement for a "Necoco" doll series, Eiji orders one on a whim, imagining a moe-tastic hadaka-apron-wearing girl to show up on his doorstep. Instead he gets a scrappy looking boy, and to make matters worse... he's an aggressive, tough-talking little brat.

Also contains a oneshot called Good Awakening to The Master.

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Love Neko (New Edition 2007, 16P additional!)

Despite his endless enthusiasm and flashy style, Koshiro just can't seem to get a girlfriend or even a date. To make things worse, the cute girls that ignore him all go flocking to aloof Kirihara who glides through life effortlessly and unaffected. In fact, the only thing that Kirihara seems to take enjoyment in is watching Koshiro's failures. Why do these opposites keep getting thrown together or is it more than just coincidence...

Continuation of Milk Crown, Milk Crown H, a romantic comedy with a cute plot, is by Mizuto Aqua (the accuracy of translation is unknown). It is the story of Tachibana Oto, a ditzy girl who works at the Class Z dormitory as a maid to earn her school tuition. On her way to the dorm, she bumps into a gang of fighting people. When she interferes to break up the fighting, she was pushed around. A mysterious stranger, with GOD tattooed on his arm and a partly died fringe, timely comes to her rescue. He turns out to be Goryukanda Jin, dormitory head of Class Z, the people considered elite to others because of the various talents they hold. Though not in full recognition, Oto instantly falls in love with Jin for his daring ways and the un-human like traits he holds. She soon meets the other residents of Class Z, some who seem ordinary, some who seem strange, and some who seems extraordinary. The manga goes on with her life at Class Z, as she gradually discovers each of the resident’s talents and goes through, inevitable in the manga world, obstacles and seemly wrong decisions.

This is a collection of short stories by Suihei Kiki that were serialised in the Seasonal Gangan Powered magazine's 2003 Winter issue all the way to its 2004 Winter issue. Ignoring the tame nature of Suihei Kiki's debut work "Mahou Shoujo Rukana", Suihei's "Mika ni Harassment" short stories are extremely ecchi in nature for a manga serialised in a shounen magazine aimed towards children. Ecchi to the point that the compilation in March 2005 was jokingly advertised as Square-Enix's first adult manga.

Mika ni Harassment: In the first story, Mika makes a wish on a mirror in order to change the world into one where boys don't have ecchi thoughts when they look at girls. In the second story, Mika's school falls under the control of a misogynic dog who hates high school girls (which includes Mika). Finally, in the third story, Mika raises the ire of six-year-old child genius, Kokoa, who forces Mika to attend kindergarten again.
Kasumi Otoko no Ko: A story about a girl called Kasumi who is a tomboy. One day, Kasumi's friend, Haruna, gives Kasumi a Chinese doll that supposedly houses an ancient Chinese goddess of femininity. Kasumi drops the doll into a ditch, which causes the doll to seek revenge on Kasumi.
Mahou Shoujo Rukana: A story about a boy named Shuuichi, who has a special power that lets him communicate with animals. One day, Shuuichi moves in with a scientist who wants to study Shuuichi's special abilities. Also, the scientist's daughter is a magical girl called Rukana. Though, Rukana breaks many magical girl stereotypes.

Note: The author published sequels in form of hentai Doujinshi.

Contains two stories:

I. Migiko Nipponichi!! -
As children Sakon confessed his love for Migiko and promised to protect her, but not long after suddenly cut all ties with her. Now, many years later, Migiko is determined to make Sakon take notice of her by becoming Japan's Number 1 idol. - From Solaris-SVU.

II. Takuya of the 7 Wonders.-
There's a rumor in the school that if a person steps into the school at night, they will disappear. Sanami, a middle school student who is oblivious about the rumours, decides to prove those rumors out. She gets her best friend missing and now must save her before she disappears.

From Shoujo Crusade:

In exchange for being the only one who knows his secret, Yuna is tasked to hang out with the quirky student council president... who has a habit of separating from his body and following Yuna around as his soul?!

Kohamaru comes from a peculiar family - each member can switch bodies with his or her soul mate! His parents can switch bodies, and his aunt, oddly enough, can switch with her cat! Now it's Kohamaru's turn...

When Kohamaru literally runs into Nanao, the girl of his dreams, they switch bodies. True love, right? Well, unfortunately, she's in love with someone else. And if that weren't bad enough, the "someone else" turns out to be Kohamaru's twin brother Konatsu... who can reverse their transformation with his own kiss!

Shiino Tazumura is a bit of an odd girl. One day in a park, beside what is rumoured to be a haunted house, she discovers a beautiful dog injured behind the bushes whose wounds she tends to. The next day, a beautiful boy resembling the dog shows up on her doorstep...

Mekakushi no Kuni is the story of high school student Outsuka Kanade who can sometimes see a person's future with a touch, and transfer student Naitou Arou, whose ESP is limited to past events. When Kanade glimpses an unfortunate incident coming, can she change it? She soon befriends Arou, who's no novice. While Kanade’s power is limited to the near future and is somewhat incontrollable, Arou’s is permanent and he can even use it to see an object’s “memories”. Are these teenaged seers of the past and future made for each other? And who's right: Arou with his "hands off" policy about meddling in people's lives, or Kanade whose more proactive stance has already had unhappy consequences?

It's the start of high school, and Kako decides to "produce" her bookworm of a childhood friend, Kousei, so that he can become a good-looking and popular school idol. She models him after Lawrence, a character in a manga she likes, but as Kousei's transformation becomes a huge success and he extends his new character beyond what she asks for, what will Kako do? Will she find herself left behind in the wake of his newly found popularity?

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Also included is a story called Megane Danshi Shinka Setsu (Theory of Evolution for guys with Glasses) in volume four.

A collection of short stories of girls who luv their megane boys~! 1) Bousou?Otome by IKEYAMADA Go High school girl Chihiro is, in fact, a shoujo manga author! She bases her manga on her wild ideas with her first boyfriend, Izumi-kun, but she's keeping it a secret from him...? (Also included in Get Love!! vol 6) 2) Gyutto Shite Chuu by CHIBA Kozue (Also included in Gyutto Shite Chuu) 3) Kimi wo Choudai by KURUMATANI Haruko Himeko-sama who hates to lose actually loves Ren whom she sees as a rival. The Himeko-san in Ren's eyes is...? 4) Kyuukyoku Kareshi ni Yamitsuki Kanojou by SHIRAISHI Yuki Chisako has a boyfriend that's the head of the public morals committee but she has a secret that he must not find out! (Also included in Ojousama no Himitsu) 5) Seitokaishitsu de Himitsu no XX by MAMURA Mio Mayu, who admired the student council president Kanzaki, enters the student council. But as she gets closer to him she finds out for the first time his cold, real face. 6) Megane Jikenbo by NAODA Tsuboko Chiri is always competing with her childhood friend who is the top of the school. Ever since the one time that her result changes, she can't stop her mouth from saying that...? 7) Megane Danshi wo Hitorijime? by HATTORI Miki When Sakurai came early to class one day, she starts talking to guy who wears glasses in her class who also came in early. Bored by his responses, she decides to steal his glasses revealing this four-eyes is actually quite a bishie! 8) Kimi no Heart ni Koi no Ya wo by OTANI Hanayo Akane loves her senpai of the archery club. She happens to confess in full vigor, but the answer is NO!

From Fantasyshrine:

High school student, Kaiya Mito is currently going out with Sakaki Yuma, a young enterpriser. Out of frustration, Mito daringly threatens to cheat on the seemly nonchalant Yuma! What's more shocking is that Yuma seems unaffected by the threat and encourages Mito to do it. So during their vacation in Hawaii, a furious Mito decides to carry out his threat. However, even when he's in someone else's arms, all he can think of is Yuma. But what's the reason behind Yuma's stoic attitude? An adventurous love story.

Mazinger Angels chronicles the adventures of four women who pilot giant robots in the Mazinger vein. The concept is a spoof on the late 70's and early 80's popular TV series Charlie's Angels.

Three of the robots, Aphrodite A, Diana A and Minerva X are from the original Mazinger Z series, while Venus A is from the Great Mazinger series. Their pilots are also traditional characters from Go Nagai's universe, Sayaka Yumi and Jun Hono from Mazinger Z and Great Mazinger respectively, and Hikaru Makiba and Maria Fleed from Grendizer.

The style of the manga highlights the sex appeal of both the characters and the mechas, sometimes similarly to the way Aika's female characters are shown. (taken from wikipedia)

The Norse god of mischief Loki has been banished to the human world in the body of a young boy. In order to redeem himself, he sets up a detective agency and dispels the evil residing in people's hearts. He is joined by Mayura, a spiritually clueless high school girl with a passion for mysteries, and eventually, other Norse gods begin appearing around Loki for unknown reasons.

From Project Bite Me! Scanlations:

The creator of Baoh and Jojo's Bizarre Adventure presents a manga about magic and mysteries! You'll meet him at 13:13 pm, on Friday the 13th. He'll do an uncanny intro where he plays a trick on you! And wherever he goes, trouble seems to always follow. Who is this person who creates such incidents? None other than Cool Shock BT!

From CPM:

An alien armada from Jupiter has amassed enough power to destroy all of Earth's defences. Earth's final hope lies in the Space Battleship Nadesico, a ship created using recently discovered extraterrestrial technology.
Can the Nadesico's rag-tag crew overcome their idiosyncrasies and defeat the alien fleet, or will Earth's last hope be lost?

The manga differs greatly from the anime

Marichen finds herself in a different world when she wakes up. The only way to get back home seems to be finding three elements and bring them somehow back to her dream. The three elements are: Peace, Compassion, and Eternity. Her adventure to seek them out begins, or not.

Note:
The plot is very much incomplete, but the author made a note in the end of the book, stating that she is fully aware of it and that she had to end the series due to some issues. She claims that she plans to restart it one day again, but apparently, the author discontinued this series in order to start a new one, Shining. (JanimeS)

[From Viz]:

Ginta Toramizu is a 14-year-old kid who doesn't have a lot going for him: he's near-sighted, doesn't do well in school, sucks at sports, and to top it off--he's short! But Ginta is a dreamer and has had the same dream 102 times, always in the same fantasy world, where he is a hero blessed with all the abilities he lacks in real life.

Then one day a supernatural figure appears at Ginta's school and summons him to a mysterious and exciting new world! In this strange universe filled with magic and wonder, he is strong, tough, agile--and he can see without his glasses! Thus, Ginta begins a mystical quest in search of the magical items known as "ÄRMS," one of which may have the power to send him home. Joining him on this epic journey are his companion Jack and the valuable living, talking, mustachioed iron-ball weapon known as "Babbo," which everyone wants but, it seems, only Ginta can possess!

In a world where demons and humans are at war, there exists a Demon King, whose voice holds a power that destroys all in its way. When an unusual Hero attacks his castle, what's a Demon King to do other than confess his love? But thanks to meddling minions and the inconvenience of a voice that destroys everything in its path, his confession may not go according to plan...