AU recs
DCU

Shards of Night, by Marcelo. Het, Lois/Clark. (ca. 830 words)
Clark in this story is more alien than in canon. The story is on the scary side, but I actually felt sorry for Clark, because he's still one of the good guys.

The Call, by Marcelo. Gen, Bruce Wayne. (ca. 450 words)
Another short, yet scary DC AU. The author describes it as "DC Comics meets Lovecraft" and I really like the creepy premise for Batman here.

Supernatural

Dromoscope, by Emily Brunson. Gen, Dean Winchester. WIP
It's a fusion with the novel "Jumper". I haven't read that, but still enjoyed the story so far. The premise is that Dean is able to teleport, and keeps this secret from his family.

The Heist, by Starrylizard. Gen.
This last one isn't a fic rec, but an AU vid. It is really fun though. Sam and Dean are bankrobbers.