A/U. From the Dominator invasion to the future, back through the past and everything in between. In the Arrowverse, nothing is ever really set in stone thanks to the Multi-verse. One-shots abound - some connected and some not - that feature nearly the full cast of characters from every show. Pairings: Barry/Kara, Oliver/Nyssa, Sara/Ava, Caitlin/Winn, Thea/Roy, Cisco/Gypsy, etc.

In an alternate universe both Barry and Kara exist together. This is what happens when they meet in college and fall in love. Follow them, their family, and friends through life from college years to being superheroes and beyond. This is Karry Universe. Leading the Millma Verse.

Barry Allen and Kara Danvers felt a spark when the Flash accidentally crossed over to Earth-38, but Barry had to return to defeat Zoom, Kara had to focus on Non, and both had their own romantic interests elsewhere. But other forces are at play, and a rare opportunity might lead to something else for Supergirl, National City, and the multiverse itself. AU

Two worlds collide when Supergirl faces a threat she's never seen before. Confused, she finds Barry Allen in the same situation and together they rally a team in hopes of destroying the evil that has united against them. They're in the fight of their lives.

A young man leaves his life long home in search of his father. But can he survive the harsh wasteland, or will he fall into the depths of the apocalypse like so many others?

Barry is back in Kara's universe, but things are not what they seem. Will focus more on Karry than anything else; not so much on the fighting and saving the world stuff.

Betrayed by her own world and left for dead an old friend arrives to save Kara from death. Deciding she has had enough of risking her life for others, Kara starts a brand new life with new love and new friends, leaving Supergirl behind forever.

This is the story of Marcus. To the residents of Vault 101 he's just a regular 18 year old kid; who happens to be carrying on a secret love affair with the Overseer's daughter, Amata. But soon fate will step in, and he will be forever known to the rest of the Wasteland as "The Lone Wanderer." Formally "Fallout: Escape"

The Lone Wanderer was widely known for his heroic acts all around the vast wastes, especially the destruction of the Enclave. A mysterious faction emerges in the void of power left open in the Capitol wasteland. Their intent is unknown. As time goes on the Wanderer finds himself battling to save everything he has left. Will his secrets be his downfall? Formerly known as 'Missing'