From Easy Going Scans:

Leesu came from a poor family but he didn't mind at all not having any money or status. Being the school's strongest fighter made him feel as if he was on top of the world in his eyes. But alas, a car accident made him lose what was most precious to him; His ability to fight! Craving for his past glorious days he turns to fencing with the hope to regain what he once had?

Great Mazinger starts after the defeat of Mazinger Z. Tetsuya Tsurugi is the new protagonist, piloting the powerful Great Mazinger, a creation of the once thought dead Kenzo Kabuto, the father of Koji Kabuto. This time the enemy is the Mycene Empire and its powerful robots.

Wakamatsu Masato lives with his step-sister, Miyuki, whom he does not have blood relationship with. Their father is always working oversea (in fact, he has not appeared in the manga at all...) and left the two of them living by themselves in Toukyou. Miyuki is cute, nice, sensitive and very popular among guys around Masato. Masato has a girlfriend at school whose name is Kajima Miyuki, who is pretty and gentle, the ideal dream of every high school boy. It took years for Masato and his sister to realize whom they love and care most after a lot of events.

This manga was very popular in Japan and was one of the winners of the 1982 Shogakukan Manga Award for shōnen or shōjo manga, along with Adachi's Touch.

In this school fantasy story set in the distant future, creatures contaminated by pollution have overtaken the land, forcing humanity to live in isolated mobile cities called Regios. One such city named Zuellni is a self-contained school in which freshman Layfon Alseif has just enrolled. Layfon reluctantly joins the 17th Martial Arts Studies Unit led by the third-year student Nina Antalk and embarks on a series of adventures.

An original side story that focuses more on Nina.

From MangaHelpers: Puzzle fanatic Daimon Kaito has been crazy about solving brain teasers, puzzles and riddles his entire life. He attends the prestigious Root Academy with Nonoha, but spends most of his time creating and solving puzzles. Kaito is one of the few genius teenagers that attend the school who has been given the title Einstein, along with his other just as brilliant classmates who were given the titles Galileo, Edison and Da Vinci. Together, they attempt to solve a puzzle that, since its creation centuries ago, has never been solved. But the genius students soon realize that there are dangerous forces behind the impossible puzzle. [vyc]

All humans in this world can use the power of the light of mana, and those who can't are considered to be subhuman 'Norma.' The world is like a peaceful utopia, and the celebrated princess Angelize leads a happy life. She believes that the only darkness left in the world is the existence of the horrible Norma. However, in a ceremony on her 16th birthday, the truth is revealed--Princess Angelize is a Norma. Now she is going to learn what her society does to Norma. She is sent to an isolated island full of others like her, who are taught that the only reason they are allowed to live is in order to fight to protect the peace of this world. Now "Ange" is part of a squad that pilots Paramails and fights invading extradimensional dragons.

From MangaHelpers:

Inudzuka Taromaru is a first year high-school student who looks like a delinquent. One evening, while he's at his part-time job, he ends up with a white-feathered arrow through his head! He's told that this arrow means he has been chosen as the sacrifice for "Inugami-Hime," who lives on top of the nearby mountain. However, this mysterious "Inugami-Hime" turns out to be a cute girl who has chosen him to be her servant, not her sacrifice. Their life together is just beginning! [tethysdust]

Narue is an adorable schoolgirl with a secret. She's really an alien with powers right out of a sci-fi comic! But growing up is never easy, and sometimes it doesn't help when you're from outer space. Join our spunky heroine as she faces androids, alien invasions, and (scariest of all) her very first date!

Note: Won the Seiun Award for Best Comic in 2014.

Collection of short stories about the misadventures of Tomoko Kuroki

From MangaHelpers:

This is the official comic based on the game of the same name. An all-girl's school is preparing to consolidate with another nearby school, which will make them co-ed. Uryuu Shingo is chosen to be a male 'test student' at the girl's school before they officially merge in the following year. On Shingo's first day, he learns that many of the girls are not happy about the coming merger. Specifically, Seno Airi is staunchly opposed and refuses to welcome him to the school. Some of the other girls are friendly, but Airi has a lot of power over public opinion. The truth is, though, that Shingo has met Airi before. When she and Shingo's little sister got lost, he helped them find their way. Airi seemed to like him then, back when she didn't know he was going to be her new male classmate. Maybe he'll be able to win over Airi, as well as all his other interesting female classmates! [tethysdust]

From Cireus-Scanlations:

Tanlou is one of the roaming Blair tribe: a stubborn lot who keep to themselves and frown upon interaction with "outsiders". He, along with six of his friends find a young princess from a nearby castle, wandering in the forest. She begs them to help her, but their help comes with a price. Tanlou is cursed by the head of his clan, and the seven men are banished. Still, they feel compelled to help her. The princess' name? Snow White. After a vicious battle to regain Snow White's kingdom that leaves the princess gravely injured, the evil queen unleashes her wrath, and the unthinkable comes to pass when two of the seven mysteriously disappear, leaving behind five bereft buddies who have no idea what has become of their comrades.

And thus begins the plight of Tanlou and his friends...

From Viz:
Somewhere in the desert lies the world's greatest treasure: the 12 Rings of the Dead, the only source of the mysterious substance Zombie Powder, which can raise the dead and grant eternal life. Into this world stalks Gamma Akutabi, a man with a metal arm and a six-foot chainsaw, cybernetically enhanced master of the legendary martial art.
But it takes more than one man to find the ultimate prize. You need a team: super-gunman C.T. Smith, knife-slinging teenager Elwood, and brilliant (and impossibly big-breasted) journalist Wolfgangina. Against an army of crooks and killers, against runaway trains and super-powered madmen, they'll need all their skills... but the most dangerous thing in the west might be the Rings themselves.

Includes 3 one-shots:
- Ultra Unholy Hearted Machine Vol 2
- Rune Master Urara Vol 3
- Bad Shield United Vol 4

From ADV: Buyer beware - when video game obsessed Kaito Suzuki mysteriously receives a game called Gamerz Heaven, he gets a lot more than what he bargained for! Not only is he playing the game, he finds himself being sucked into it! With a boy named Nata serving as his "Navigator" in the game, Kaito will have to eliminate all of the monsters before he can enter the Second Zone. Things become difficult when Kaito realizes that losing this game had deadly implications for the real world! Baka-Updates has this series marked Complete/Discontinued

The stage is Kyoto. Takiguchi Tsuina is a girl possessed by a curse that brings misfortune upon all those she falls in love with. Such a girl falls in love at first sight with the newly transfered Mikado-sempai, who is in fact an exorcist of the Department of Prevention of Supernatural Disasters. In order to walk along the same path as the one she loves, Tsuina becomes an apprentice of the wandering exorcist, Izuna.

Note: This is the story of the two newly appeared characters, Takiguchi Tsuina, and Mikado Mine (who make their debut in volume 8 of the original series).

If you wished for your own death, how would you like to go? Here is one boy's encounter with a grim reaper...

Takenori is a major fan of Dating Sims. One day, he receives a strange E-mail that tells him he can be the main character and asks him to insert the source material for his new world.

Takenori inserts his favorite Dating Sim "Eternal Innocence" and after strange things he mistakens for a dream, wakes up - to find that all the heroines from Eternal Innocence have come to life in his usual surroundings!

For most people, having one’s own mecha sounds like a dream come true. So when Eiji’s father builds him his own girl mecha to help around the house, he thinks life is about to take a turn down easy street. Unfortunately for Eiji, his eccentric father isn’t about to make it that easy, and his new mecha girl seems to have a mind of her own – one that doesn’t necessarily take to doing what she’s told. Will Akira-chan prove to help Eiji’s life, make it more complicated, or a little bit of both?

For some reason, the sadistic demon prince Beelzebub is living in the human world and attending high school. He begins a strange friendship with his classmate Hanako, after she defends him when he gets beaten up by a gang.

Note: Original language image (i.e. no English subtitles) is unavailable.

From SCX-Scans:
Kyuno, who's aiming to become a Sister, just became a Sister-in-training, and started her dormitory life with Ginger and Alicia, aiming to be the same, however...

Shizukuishi has a problem. Well, a number of them, actually: She wets herself chronically. She occasionally loses complete control of her actions. She's being hunted by an army of robot maids. The root of all her troubles is the soul of the ancient destructive giant Daidara-bocchi, which is sealed in her womb.

But she's not alone. By chance, she became attached by a thread made of light to Kouki, a "contractee" who helps maintain the burden of the seal within her. Together, Shizukuishi and Kouki face her toubles and fight against the evil robot maids, but if they get too close to each other, then something terrible could happen...