Bridging Two Solitudes by Scullspeare
A vengeful spirit's attack leaves Dean hypothermic and fighting for life, while a concussed Sam, lost and alone, battles to get back to his brother
http://www.fanfiction.net/s/4010528/1/Bridging_Two_Solitudes

The Man in the Dark by P.L. Wynter
Only when I saw the flash of his knife did I realize it was too late
http://www.fanfiction.net/s/2784527/1/The-Man-in-the-Dark

Forseen by P.L. Wynter
In 1967, tragedy struck Point Pleasant, West Virginia. They were given their warnings. No one listened. Now, the warnings are back.
http://www.fanfiction.net/s/2705943/1/Foreseen

Lessons by MonicaMeMe
Murders at a college campus lead the brothers on a ghost hunt where Dean seems likely to become the next victim
http://www.fanfiction.net/s/2985267/1/Lessons