Character
Chats and Forums, Ajs Middle Earth, Anuonnen, Aragorn and Legolas In Love, Axe and Bow, Bag End Slash Archive, Bagenders, Bill's Paddock, Bow and Bloom: Metaphor, Elf N Hobbit, Éomer Slash Archive
Real-Person
Chats and Forums, Den of Shadows, Dongaer, I Want Him, Lobelia's Niche, Monkeycrack, Inc., Night's Garden, Ringspell, Simply Them, Unfettered Words, Untapped Beauty
Chocolate Dipped Hobbit
Stories by Kinkyhobbit and Kevswitchau, including the "Five Go Mad in Middle Earth" crossover, and real-person slash stories featuring Elijah Wood.
Fellowslash
A convention for fans and writers of fantasy and real-person slash, last held in Pennsylvania, USA.
Four Hobbits
Real-person and character stories written by Uluviel, featuring the Fire and Ice series.
Lanna's Cûningerin
Focuses mostly on Aragorn and Boromir, as well as the men who play them. There is also slash from other Sean and Viggo movies.
Minya Andúnë
A collection of favorite character and real-person slash stories. Most feature Boromir, Aragorn, Faramir, or Legolas.
Secret Panel: LOTR
character and real-person slash fic by Jenwyn, including the "Wrong to Love You" series.
Sweet As Sin: Lord of the Rings Slashfiction
Stories by Bluekat, both movie- and book-based, featuring the Varg series about Sean Bean and Viggo Mortensen. Other pairings include Boromir/Aragorn, Merry/Pippin, and Dominic/Billy.
Vera's Dreamscape
Archive for character and real-person slash stories, most featuring Aragorn or Legolas. Also has X-Men slash.