AnOtherWiki
alt.horror.werewolves (Google Groups Mirror)
Where the concept of weres and therianthropy originated.
Beyond Awakening
A blog comprised of multiple authors aimed at writing about how otherkin or therianthropy influence a person after 'awakening'.
BootCamp
Series of rants on therianthropy and real vampirism.
Cynanthropy
Dreamhart
Jarandhel Dreamsinger's blog and site on the subject. Would be of particular interest to those who are into more past life oriented interpretations/experiences, as well as those interested in assorted pagan/metaphysical practices.
Lair of the Toxic Elf
Kyrin's personal site on being an elf, among a few other topics.
Lupine Instincts - Between Land & Sea
A personal site on being a 'seawolf'. Contains personal writings on Therianthropy in general also.
Otherkin News
A place dedicated to posting news regarding otherkin and therianthropes, such as media appearances, articles and other events.
Otherkin Resource Center
This was an old website that stopped operating in 2002. Most of the content has since migrated into Otherkin.net. It has been placed here for historical reference.
Otherkin.net
Features a large body of articles, lists of mailing lists and a directory, among other things.
Silver Elves
Can be off-topic, but does contain relevant writings about elves and otherkin in general.
Starlight Awakening
Arethinn's body of links, writings and resources. Of particular relevance to fae, as well as some items of particular relevance to elven kinds.
The Art and Writing of Scribner
Orion Scribner's body of writings on otherkin. Features an extensively researched history of otherkin and therianthropes and those who had identified as things within that spectrum.
The Land of the Dark Elves
It doesn't say it is explicitly related to these kinds of things itself, but it has been linked to as an 'otherkind' site and has some clear links to ideas of otherkin, and it has original and relevant content that may be of interest.
The Lostkin Project
Therian Info
To Play Upon The Leaf...
A personal site. Also contains a lot of writings from other kinds of therians in it's 'Animal Folk Philosophy' section, and contains a variety of writings that may be of particular interest to feline therians.