The first story, Wings of Light and Darkness, takes place between episodes 43 and 44 of the GaoGaiGar TV anime. In this three-chapter story, a bit of the backstory of Soldato J and Arma is revealed as they come into contact - and conflict! - with one of J's old comrades: the Black Soldato, J-013.
he second story, Evoluder Guy, takes place between the end of the GaoGaiGar TV series and the start of the GaoGaiGar FINAL OAV series. In its five chapters, witness the theft of the new Super Mechanoid - the Fighting King of Braves, GaoFighGar - by the underground global criminal organization, BioNet.

From Yen Press:
Sora, a young boy who lives a peaceful life on his tropical island home, is set adrift when a horrible storm wrecks the world he loves and separates him from his friends, Riku and Kairi. In another world, the Disney castle is in chaos when King Mickey goes missing, and it’s up to Donald, the court magician, and Goofy, the captain of the army, to find their king. When both Sora and the King’s allies happen upon each other and learn that the ills that have befallen their worlds are the doing of dark beings without hearts known as the Heartless, the three recent acquaintances take up arms together in an epic quest to travel to unknown worlds, set those worlds right, and find their friends!!

An alien species wanted to start a revolution against their oppressors, and they think they may have found the power in humanity to accomplish their goals. They discovered that humans have latent superpowers, and so they began to abduct them and awaken their abilities. Unfortunately, the humans' abilities were not very useful for their purposes---at least not until they found the destructive power of #214.
#214 is actually a young woman named Hoshi Yumako, who has no interest at all in the aliens' revolution. The abduction and powers have seriously screwed up her life, and all she wants is to be able to live a normal life. Pursued by the aliens, she tries to work part-time and keep her powers from ruining everything. However, she knows she's not the only one out there; she might find allies among the empowered rejects of the aliens' experiments.

From LuffyNoTomo Translations:

Oz Williams is a kid genius who has a special power when it comes to helping the dead get revenge!

19th century London is the place where kid detective Oz Williams and his unusual assistant live. Oz helps solve cases that the police have trouble with and in the end, the murderer always ends up killing themselves due to a mysterious power Oz shows them in order to take revenge for the dead.

Oz has the ability to hear the dead and in the form of a Jack-o-lantern, the dead take their revenge on their killer. Oz loves sweets and always wears a Halloween costume all year round, so that's why he is known as the Halloween detective!

Vyalen, the main character in the story, is a graduating high school student from their school.Their school was pretty known as one of the best athletic and academic breeding students. In other words, only those who have special talents, elite minds, and abilities could only enter the school. Each of the students were categorized according to their major fields-- like being an elite, academic, and athletic. But, for the school's first in history they were not able to categorize Vyalen for whom he has this unknown ability that allows him to "artificially" use or create talents that he's not even used to... Moving on, within only 12 twelve days he will be graduating from his high school. That's why he is in a hurry for confessing his love to her long beloved crush, Trixy. But suddenly one morning, on his way to school, he suddenly bumped into a puny little nerdy girl named Lnear. having the thought that he had heard this name somewhere... later on. He finally realized that it was a classmate of his that must be sitting next to him that never came to school since the first day of class...

A collection of short stories.

From K.I.S.S.: Everyone dreams of getting into Glory Hill, the university where successful applicants are guaranteed fame and fortune. Being looked up to as role models, the people of Korea are anxious to see what will become of the five new students which have been accepted. Watching from a distance a boy sits at the bus stop with an indescribable look etched onto his face. Original Webcomic

From OSTNT:

When a game turn into reality and your husbando is summoned in front of you, what will you do?

A collection of eight Zombie related oneshots by several authors.

And I Love Her by Katsuya Terada
What would it be like to live a life with a zombie grandmother in the basement?

Dead and Fail to Die by Hitoshi Kino
Story about a special section of police in a city plagued by an outbreak of a deadly disease.

Children Living with Corpses by Uguisu Sachiko
In a Japan, where zombies are lurking in streets, the small Mika and Makoto are still human unlike their parents that day after day become more and more hungry.

Zombie by Shimada Toranosuke
During a meeting of former classmates a person reports that their old friend is dead, and that during the wake hid body has disappeared.

Forest of Spirits by Hokazono Masaya
A story of how a young student helps his professor revive his dead wife.

Zombie Boy by Hiromoto Shinichi
Shows us the adventures of an unemployed guy who gets a job as a janitor and finds himself chasing zombies.

Fight of of the Living Dead by Koizumi Tomohiro
During a martial arts fight one of the fighters feels ill and vomits; taken to the hospital, he confided to his friend that he had been bitten by a zombie.

Organic Human Solution Organogel by Fukao Atsushi
Year 2073 - Terrorism has spread everywhere and with it biological weapons. In this scenario, a healthy girl goes in search of hear father from whom she was separated, revealing a horrible truth.

Includes illustrations by Hiroe Rei, Samura Hiroaki and Matsumoto Jiro.

Viewed by some as a monstrous scourge and others as dark gods, the dragons are almost as ancient and powerful as Odin and the other Aesir, and for countless years have lived wild and free, unbowed and soaring across open skies. But things have changed. The dragons have been tricked and enslaved by the malevolent Loki and the traitorous Nidhogg, the Black Dragon. Now, their only hope for freedom rests with those few dragons who were able to avoid enslavement, one of whom was Iris. With ancient fire burning in her veins and hungry for vengeance, Iris has allied herself with the Einherjar so that she might gain the chance to burn Loki to ashes and free her captive brothers and sisters. Crystal Arena is a manga series based on the strategy game Crystal Arena, a story of the legendary Einherjar fighting alongside with the mighty gods in the ultimate battle of Ragnarok.

From MangaHelpers:
The end of the civil war signaled the start of the industrial revolution in the United States and immigrants from all over the world traveled to find their American dream. But what awaited the majority of them was poverty, discrimination, and hopelessness. Manhattan, New York was full of immigrants flooding through the ports and the 6th district, Five Points, was considered at the time, the world’s worst slum. The mobsters corrupted the entire area, including the police by paying them off; Five Points was the mob's territory and they were the law.
But even Five Points, where there seemed to be nothing but robbery, prostitution, and murder, showed some signs of hope. Luke Burns was an honest and righteous teenager who realized that the mob was the cause of their harsh lifestyle and that joining the mobsters would not bring him the American dream. But his older brother, Brad Burns, had become an assassin for the biggest mob group of Five Points, the Grave Diggers, a secret he kept from Luke for his own protection. Brad was known as the Grim Reaper and his reputation preceded him as a ruthless and skilled killer.

A high school boy named Kōichi Madanbashi who has Hi-ERo particles, the power source to operate the robotic weapon Daimidaler. With the help of Kyōko Sonan from the mysterious Prince Beauty Parlor organization, he stands up against the Penguin Empire that troubles humanity.

"Minimum" or "minor miracle"? special hereditary powers discovered only in an extremely limited number of humans. Those who possess such powers are known as "Minimum Holders."

Partners Nice (Ryota Ohsaka) and Murasaki (Wataru Hatano) form a detective agency called "Hamatora" in Yokohama in 2014 ? but their "office" is a table at Cafe Nowhere where they and their friends wait for clients. An old acquaintance of theirs, a cop named Art (Hiroshi Kamiya), hires them for a serial murder case he is investigating, and they discover that the murder victims are all "Minimum Holders." As Minimum Holders themselves, Nice and Murasaki are drawn into this case, whether they like it or not.

The history is about a half japanese, half italian man in New York, who works as a contract killer for the mafia

K, a robot detective, joins the Tokyo Metropolitan Police Force’s Science Division and is partnered with human partner, Shinjo Go much to the chagrin of Chief Inspector Shiba Daizo, who distrusts the Robot. Together they battle the crimes perpetrated by the renegade conglomerate R.R.K.K. “BADO” (Robot Rental Kabushiki Kaisha – Robot Rental Company)

The ever lasting war between good and evil rages on..or at least that's what he was lead to believe!A young boy becomes the prize for which the legions of heaven clash with the hordes of hell.Being deceived by God and prosecuted by Satan,Malei Damakotto bears the burden of power that could be a grand asset or a terrible scourge for either one!Malei will stand against a fate predetermined by the self proclaimed lords of this world and bend both the will of light and malice of darkness under his fist!Wings shall break and claws shall shatter as he enters the battle of battles on his own right!

Meet Eguchi Yoosuke, leader of a high-school Biker Gang AND the school's handicrafts club. Which means he divides his time between fist fights and fancy needlework. And if you think he's weird, wait until you meet the rest of his gang...

From Wikipedia :

Two years ago, a pair of idols, Tsubasa Kazanari and Kanade Amō, collectively known as ZweiWing, fought against an alien race known as Noise using armor known as Symphogear. To protect a girl named Hibiki Tachibana, who got severely wounded by the Noise, Kanade sacrificed herself. Two years later, as Tsubasa has fought the Noise alone, Hibiki ends up gaining the same power as Kanade.

Kurenai Shinkurou, a 16-year-old dispute mediator, is one day approached by the daughter of a powerful plutocratic family asking him to be her bodyguard.

From DarkoNeko:

This is a post-war world where human-shaped weapons called scabbards exist. Cuifa and Livia are traveling government agents looking after the declining scabbard population, checking on their living condition, potential abuses, and the worthiness of their masters.