Fan fiction
From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
Fan fiction is fiction written about the Battlestar Galactica universe. There are extensive amounts of fiction written about both the original series as well as the re-imagined series.
Re-imagined Series Fan Fiction
Battlestar Gemicon - collaborative fan fiction based on the Scifi.com Messageboard
Original Series Fan Fiction
"The Best of Battlestar Galactica Fan Fiction" - collection of links to TOS fiction