www.barrowdowns.com A great site with a growing encyclopedia.
www.fingolfin.com A marvelous forum for Tolkien discussion, unfortunately, it's disappeared. Sorry.
www.delving.com One of the few dwarf-specific sites I've found.
Movies:
www.thelordoftherings.com The official movie page.
www.theonering.com A complete site with all sorts of info...
MUSH:
Elendor The largest Tolkien MUSH.
Beleriand A great MUSH based in the Silmarillion days...
To my Homepage.