From Dan of Population GO: Based off of The Song of the Nibelungs comes a manga about bravery, honor, and heroism. As the last of his people, Siegfried will stop at nothing until he becomes a legendary knight whose story will last eternity. If his legend lives on forever, then so will the memory of his people...and that is his sole reason for going on. 

From Fallen Syndicate:

A stylish suspense action manga depicting teenage battles!

A special oneshot story of Captain Tsubasa as part of the celebration of the 40th anniversary of the magazine Weekly Shonen Jump. This story occurs between the end of the juveniles soccer championship and the middle school soccer tournament of the original Captain Tsubasa series. Tsubasa is depressed after Roberto left him behind and his friends Genzo and Taro are going overseas. In order to cheer him up, his friends organize a friendly match with all his rivals from the juveniles soccer championship.

Chris Redfield and Jill Valentine arrive in a remote Russian village to check on rumors that a wolf infected with the T-Virus had attacked its inhabitants. It wasn't long before the two ex-STARS officers found them battling against the villagers, now turned into zombies.

Set in 2194 AD, China, which is now a prosperous, super-modern country. The characters are mostly reincarnations of warriors from the 3 Kingdoms period. The story begins in Shin Yokohama with main chara Todoroki Ranshirou driving around & causing a ruckus with his bousouzoku called Yokohama Road Stars, when he gets a mysterious package from his father. Soon after he's attacked by Blades and makes an astonishing self-discovery... that he's the reincarnation of Sun Ce!

From Wikipedia:

An innocent young man, Ikuroo, has a parasite known as Baoh implanted in his brain by an evil organization, Doress. The parasite makes him nearly immortal and gives him the ability to transform into a really powerful beastie when he's in trouble.

Doress intends to use him in some sort of ploy for world domination. But while they're moving him around, a young psychic girl, Sumire (who's also being held by the organization), sets him free, and the two escape together. Of course, Dr. Kasuminome is the mad scientist behind the whole thing, and he isn't about to let his test subject get away... and he has everything from superpowered lackeys to a small army at his disposal.

Lou Jie is a legendary street basketball player. His uncle, a shady character, desperately wants him to go to the best sports college in China so that one day Lou Jie can play in the NBA. Lou Jie has plans that don't include basketball, however fate may have something else in mind...

Bian Huang Ji, lying at the border of the south and north parties, is the only trade center where the rich and powerful people gather and illegal activities take place. In this place, laws don't exist. Whoever comes here is called Huang Ren (wild man), someone who doesn't belong to any kingdom or government. As there was no war occurring here, it's prospering and growing at an exceptional speed. However, war is like the ever-changing weather, it comes when you least expect it.

In the hopes of pleasing his childhood friend and crush, Chiharu, Arata agreed to help her clean out an old warehouse from her grandfather. But what neither of them knew was that the warehouse contained "tsukumogami", ancient objects imbued with life. When Arata accidentally broke the seal on a box containing an artifact that hungered for vengeance against humanity, Chiharu was kidnapped! Now it is up to Arata and the good, loyal artifacts to rescue Chiharu before it is too late!

Minori is the manager of her high school's baseball club, which has been defunct up until five years ago. Even now, it's a little rough, since there currently are no seniors in the club at all! None of the second year players know why the club closed so many years ago, or about the baseball history all their fathers share...

The protagonist is your average, everyday, Korean school student. That is, if not for his obsession that aliens live on Earth disguised as humans.

Much to his surprise, he was right, the aliens play a game called "Avatar" where they take human form and live human lives. And because of a glitch he caused in their system, now his very life could be at risk.

Now he needs the protection of an Admin of the "Avatar game" or else he could very well die!

From Del Rey:

Since ancient days, the Gaius School of Witchcraft and Wizardry has trained the fiercest swordsmen and the most powerful wizards. Now one boy could become the greatest of them all. If he studies hard. If he is true to his friends. If he believes. And if he survives…

Another Amagami serialization in Comp Ace magazine. This version features Sakurai Rihoko as the main heroine.

N/A

A seminal history of Date Masamune. Yokoyama has a plain and matter of fact style for history without really trying to dramatize it.

This is an original story expanded from the STEINS;GATE game, and focusing on the heroine Amane Suzuha. In 2036, a monopoly on time machines has created world peace, but at the cost of human liberty.

Suzuha has followed in her late father's footsteps in fighting alongside the Valkyrie rebellion force to change the world. After the group fails on a major mission, Suzuha has almost no hope left. But then she discovers that her father left something for her: a time machine. Using this, maybe Suzuha will have the power to finally destroy this dystopian society and create a better present and future!

Sara Tanjuro just recently transferred to Mikagami Eruma's elementary school and have caused a major stir among the students. Tanjuro, knicknamed Satan, has been proposing his love to the girls left and right, something the shy Eruma would never think of doing. But Satan has a secret identity. He is a member of Michaela, a group of people who combine technology and exorcism to rid the world of angels that wreak havoc in society. As member number 666, Satan is an anti-angel specialist who has disguised the school supplies as weapons. He defeats supernatural beings with ease. Now if getting girls were that easy...

From MangaHelpers:

Natural selection has created a deadly new species known as "Eclipse," who are driven to eliminate humanity. A scientist called Kurusu Kenji headed an organization whose purpose was to fight these deadly creatures of bone. To this end, he created the "Osteon," Eclipse-like creatures that obey the commands of the human from whose DNA they are created. Now Kenji is gone, and his assistant Kidogawa Rokuko is attempting to recruit his estranged teenage son. Kurusu Akira wanted nothing to do with the father that he believed abandoned him, but attacks from Eclipse force him to accept his own Osteon from Rokuko. He slowly finds himself drawn into the organization, whose members expect him to take his father's place. Akira and his Osteon may have little interest in protecting humanity, but they are determined not to be beaten! [tethysdust]

Toshiki is a below average student and often the target of ridicule. After he accidentally runs into a shop sign and breaks it, he enters the shop and finds out it will sell him abilities.. But these abilities don't come cheap.

From Tokyopop:

Hack//4 Koma" is a four-panel (a.k.a. Yonkoma) manga series set in the popular multimedia world of .Hack. Most of the 4 Koma are filled with gags and parodies centering mostly around the main characters of the first (Kite, BlackRose, Helba, etc) and second (Haseo, Atoli, etc) series of ".Hack" videogame