Crossover one-shot between Mazinkaiser and Shin Getter Robo. It was included in Immortal Super Robot Encyclopedia (不滅のスーパー� ボット大全). The manga begins with the Mazinger Z and Great Mazinger fighting against an alien machine after the Diana A and Venus A have been taken down.

In the distant future, in a distant corner of Siberia, people live in domed cities called Domepolises. These are the primary human living spaces on Earth, which became uninhabitable years ago from environmental destruction. Now, parts of the Earth are becoming habitable again. Large portions of the Domepolises are breaking off to escape the powers that control the domes and trade.
Gainer Sanga, video game champ on his 200th victory, becomes an unwilling helper in his hometown`s Exodus when he is wrongfully arrested by the Siberian Railway. He pilots a giant mecha which he dubs `King Gainer` after his own video game handle. He is challenged to fight other Overmen as Yapan tries to escape across Siberia.

Prequel to the Getter Robo Armageddon anime.

Also published in the Getter Saga version of Shin Getter Robo.

From Crunchyroll:

Tatsumiyajima is the central island in the middle of a small cluster of islands, in a sleepy backwater of the Japanese isles. Not much happens there, and the island's young people go to school knowing that their lives are likely to remain peaceful and undisturbed. Or so they have been taught... but the truth is different. The fate of mankind is on the line, and Tatsumiyajima is the last line of defense against a hostile and incomprehensible enemy. At the center of it all, fighting for Humanity's continued existence, is the giant robot Fafner, the dragon that guards this final treasure of mankind.

From Del Rey:
In the near-future on planet Earth, a world gone mad where never-ending war is a fact of life, Kirio is the coolest kid at school. Up in the sky, a giant robot is fighting a fleet of gunships, but the brilliant and distant Kirio is far from fazed - until the battling 'bot makes an unexpected landing in Kirio's front yard and rings the bell. But the worst threat for Kirio could be what stands on the other side of the door: an alien invader robot with the face of an adorable girl!

From Cireus-Anime website: Saiga Junki is a normal high school boy who tends to be a little apathetic in general but who does manage to get better than average grades. When his archaeologist father, who went to investigate some ruins, is found dead, the family travels to the excavation site where Junki meets a mysterious stranger who gives him a ‘gift’: an ancient artifact that his father left for him …

From: Udon Entertainment
Enter an exciting new future with Mega Man ZX! Hundreds of years in the future, humans are able to merge with living ‘biometals’, transforming into Mega Men! But are even the combined powers of the Model Z and Model X biometals enough to take down the sinister Slither corporation?

Tatsumiyajima is the central island in the middle of a small cluster of islands, in a sleepy backwater of the Japanese isles. Not much happens there, and the island's young people go to school knowing that their lives are likely to remain peaceful and undisturbed. Or so they have been taught... but the truth is different. The fate of mankind is on the line, and Tatsumiyajima is the last line of defense against a hostile and incomprehensible enemy. At the center of it all, fighting for Humanity's continued existence, is the giant robot Fafner, the dragon that guards this final treasure of mankind.

Tatsumiyajima is the central island in the middle of a small cluster of islands, in a sleepy backwater of the Japanese isles. Not much happens there, and the island's young people go to school knowing that their lives are likely to remain peaceful and undisturbed. Or so they have been taught... but the truth is different. The fate of mankind is on the line, and Tatsumiyajima is the last line of defense against a hostile and incomprehensible enemy. At the center of it all, fighting for Humanity's continued existence, is the giant robot Fafner, the dragon that guards this final treasure of mankind.

SIN takes place in a post apocalyptic future derived from a universe very similar to ours. The inevitable lack of resources to sustain humanity on Earth had split the world into two warring factions, the United Nations (U.N.) and the New Earth's Alliance. (N.E.A.). After years of unnecessary conflict and technological advancement in weaponry, both sides eagerly stumbled into peace to avoid extinction. Now under the rule of the newly formed United Earth's Federation (U.E.F.) space has become the last hope for the human race. However, with resources more scarce than ever the clock is ticking. How do we decide who's privileged to live and who's not? What happens to those of us left behind? A world now loosely controlled by a single totalitarian government, overrun by gangs, private military groups, freedom fighters, and death; Life seems to provide no more than a fruitless future. Regardless, there are still those of us that fight, we fight each other, we fight the system, we fight for our loved ones... whatever the reason, we battle for answers.

The series appears to be a sequel to the earlier SD Gundam Musha Maruden. Official relations were formed between Earth and the land of Ark. At an inter-racial school attended by humans and Mobile Citizens, young Ryuunosuke befriends fellow student Kokuryu. Life at the school can sometimes be fierce, with student gangs seeking to disrupt the harmony. But in the face of this, Kokuryu reveals a powerful ability- although he normally looks like a little kid, he can transform into the maturer samurai warrior Kokuryu Gundam. The series initially involves his battles against similar robotic creatures along with Gundam friends such as the bishōnen Hakuou Gundam and good natured/rough and ready Sekijishi Gundam. Eventually a mysterious group emerges, forcing Kokuryu and company to leave simple schoolyard scraps behind and engage in life or death combat. The general merchandising gimmick for this series involves the Gundam's being able to combine. This is similar to the gimmick for the series Transformers: Energon

Before the outbreak of the colony war, forces were at work shaping the future and preparing its players for the final game. As children, Heero, Relena, Duo, Trowa, Quatre and Wufei have endured more pain and difficulties than most people experience in a lifetime and would have broken the will of any normal person. Learn their stories and motivations for becoming prominent characters in shaping the future of the world. Each chapter is named after a character and features that character's past/origins.

Note: The events of Episode Zero were supposed to appear in the TV series after episode 27 but was eventually omitted due to complications in the production schedule. Episode Zero was created per Ikeda Masashi's (director) request.

From Tokyopop: After a generation of warfare, the Gundam boys finally secured a peace between Earth and the colonies by helping to defeat the Oz and White Fang armies. Now, out of the rubble, the surviving soldiers are re-emerging and clustering together into new factions. Hero Yuy has become a vigilante pacifist, tracking down weapons stashes and destroying them, while Relena, former Queen of the Earth Sphere, tries to maintain the peace politically. But an unmanned weapons factory has been discovered somewhere near Mars, and now the boys are going to have to dust off their mechs for one more battle to save the tenuous peace.

This story takes place on an island named Southern Cross Isle. One night, a boy named Takuto washed up on shore, after having swum from the mainland. He later, enrolls in Southern Cross High School as a senior and makes new friends. However, underneath the school, is a group of mysterious giants called Cybuddies. There are about 20 Cybuddies, and they are just some of the various secrets kept by everyone on the island: The secret movements of the mysterious organization known as "Kirahoshi Juujidan", the songs of the shrine maidens. Takuto himself will soon come to embrace a great secret. from Wikipedia

From BangAQUA:

11 years ago, a disaster occurred on Earth. This awakened The Wings of the Fallen Angel Clan, which preys for humans and reduced the population of the world to a mere two billion inhabitants. They’re not hurt by human weaponry. The only things that are able to combat The Wings of the Fallen Angel Clan are the man-shaped soldiers - Aquarion. And now, Kamishiro, a young man with mysterious "Elemental Powers" stood up to oppose The Wings of the Fallen Angel Clan. Do lives of billions of people on Earth rest in the hands of one person?

In 2071, north pole ice have melted and the land has been submerged. Humanity survived but it's divided into two species: the true humans, those who live in underwater cities, and the Dugons, those who chose to undergo genetic modification to live in the sea. Both species go to war to survive as long as the Dugons consider the humans good to eat.
To defend against the Dugons, the city of Mari Ramelle builds a new kind of weapon, the mermaid robot, Salacia. Because of the small size of the the pilot cabin, the robot is piloted by a girl and a boy, both 13 years old: Marin Yuuki and Ushio Mizushiro. The fight for survival is hard, and during the manga, the city builds more mermaid robots.

Compilation book consisting of manga stories taking place during the events of season 2 of Kidou Senshi Gundam 00, telling short stories such as Soma's transformation into Marie, Sumeragi's return to Celestial Being, and Marina creating her song for Katharon.ACT 1: Setsuna & SajiACT 2: Allelujah & SomaACT 3: CB & SumeragiACT 4: Setsuna & MarinaACT 5: Saji & Louise and...

The World may be United but the time has come for Celestial Being to begin their interventions again.
For all of those who stand up in answer to the call, irreplaceable "Bonds" exist.

In the Kidou Senshi Gundam 00 (SHIGUMA Tarou) series:

1) Aoi Kikou
2) Aoi Kizuna

A short story from the Apple Collection by Patyuno (aka Yeo Joo-hyun).

Adaptation of Top Wo Narae 2!/GunBuster 2.

From here:

"Top wo Nerae 2! Diebuster follows the story of Nono, a country girl who dreams of becoming a space pilot (or to be more precise, 'like Nonoriri,' the meaning of which is revealed as the series progresses) who, due to a chance encounter with an actual space pilot finds herself becoming part of the elite Fraternity. Made up of teenage pilots called Topless, and armed with quasi-humanoid weapons called Buster Machines, the Fraternity's mission is to protect the people of the Solar System from attack by swarms of uchuu kaijuu (literally, space monsters).

The series revolves around Nono's quest to become like Nonoriri, her relationship with Lal'C Melk Mark, the first Topless she meets whom she immediately idolizes (to the point of 'ironically' calling her onee-sama, or big sister), and the hard work she believes she has to do to be 'worthy' of Lal'C's attention. It also explores her interactions with the rest of the Idols, her efforts to fit in and, ultimately, the truth to her forgotten past."

The manga covers about half of the OVA story. The "extra story" chapters in Dragon Age are more comedic than the Dragon Age Pure chapters.