A very nice, easy to use fic archiving site. This is a Tolkien only archive.
However, before you are permitted to post your stories there the first
time, they check them for the rules, i.e. no slash, reasonable spelling/grammar,
no Mary-Sues etc.
Probably the best known general archive site. There is a large LOTR section
and a smaller section for Silmarillion stories.
Tolkien Information Sites:
The site without which these fic100 challenges would not happen. Free or
paying accounts available, and the only difference between them is the
features (ie number of icons or ability to post polls).
J.R.R. Tolkien Page
You actually expect me to not plug my own site?
Encyclopedia of Arda
Probably the biggest Tolkien encyclopedia site in existence.