Set mid season 4. Mild spoilers, but nothing specific. 

In 1987, John has a bad case of zombies - perhaps his hardest yet. Meanwhile, in 2009, his boys discover that while some witches do no harm, objects in the rear view memory may appear hazier than they are.

And they carry shovels. 

Rated T for language. 

Set in Season 4, immediately after 4.02 Are You There, God? It's Me, Dean Winchester, and contains spoilers for the first two episodes.

"Well, I'll say it again. Demons I get. People are crazy."

The Winchesters have saved the world from the Apocalypse, but now a new and possibly darker threat is rising up. Humans with warped DNA are wreaking havoc on the world. Hunters all over are gathering to fight the new monsters. But when they arrive, they find that nothing is as it seems. Who are these monsters? Who can be trusted?

And are the Winchesters even on the right side?

Dark Angel Crossover. Spoilers through season four. Possible accidental spoilers for season five.

After witnessing something not quite possible, even for their line of work, Sam and Dean end up having to put up with a tag along until they can find out a way to send him back home. After all, how hard can it be to send twenty year old Cal Leandros back through a portal to his alternate universe without risking both worlds crashing in on each other? Demons to left of them, Auphe to the right… and one very pissed off Niko desperate to get his brother back.

He awoke, injured and with no memory of who he was or how he’d gotten there. All he had to go on were nightmares of a hunter he’d been trying desperately to save. But were they nightmares…or were they memories? And who was the hunter in his dreams?

Co-written with Shelly and SamJaredForever. Something is lurking around Moonlit lake and it wants Heather dead. Sam and Dean are on a hunt and that's why they are staying in Bobby's cabin. Can they hunt down the thing that's after Heather? If they don't protect her from the creature, she may be it's next victim.

 Disclaimer: We do not own the Supernatural Characters. Heather is made up and is my character.

Set immediately after "Sex and Violence". The Winchester Brothers must try and deal with the fallout from their cruel words while under the Siren's influence. Despite Dean's words at the end, they're not okay. Not yet. Written for auction winner bhoney.

Set in Season 4 goes AU through season 5.

Dean and Sam come across a woman who could be either a new friend or a powerful new enemy.

Much more...but if I tell you then there would be no fun in reading it and you should read, it's good (I'm not just saying that because I wrote it).

Sam and Dean are going after a legend.

He was invisible when alive and couldn’t be found when thought dead.

But this great outlaw has left traces and now he is calling the Winchesters home.

Finding a way home is only the beginning. Trying to deal with the aftermath of the revenants' attack, the Winchesters find themselves in over their heads when a simple hunt turns deadly, with terrifying consequences for them both; and nothing will ever be the same again.