Check out the
Hidden Archives. Also check out
Jocelyn's works on fanfiction.net. Also take a look at
Ithilien's writings. I am not sure whether either of these writers write in Tolkien's style, but they are very good--and very addictive! Set aside at least a week for Jocelyn's "A Little Nudge Out of the Door" which is twice as long as the Hobbit.
If you are looking for something darker, I would suggest Yours Truly's (not me, an author's name)
Master in Deceiving or my own rather gory
Battle Beneath the Trees. Another good dark-themed one is Ithilwen's
After Amputations. It is a poem, but still very, very good and thought provoking.
Sorry about all of these being outside links, but I frequent fanfiction.net more than the BD fanfiction section.