There's Edges (http://glovered.livejournal.com/144303.html) by glovered, where Sam's with Brady temporarily rather than Jess: "Things that Sam's already received from his brother include: a flyer from a strip club, a temporary tattoo of a bulldog, and a mysterious yet clean sock. He imagines Dean shoving things into an empty cereal box from the back seat of the car, slapping on a few stamps, and sending it off on a post-hunt high, thinking, I'm alive, I should probably let Sam know."

And then I'll Take My Chances on a Beautiful Stranger (http://fleshflutter.livejournal.com/2724.html) by fleshflutter has Dean showing up for a bit.

Catch Me in a Dark Room (With a Storm Outside) (http://archiveofourown.org/works/2816813/chapters/6319166) has Sam going back to Stanford after season 2.

Holly ivy mistletoe
http://archiveofourown.org/works/611079