General:
Deviant Hearts
Gallery of yuri-ish images from prewar girls’ magazines (and related blog post)(gallery is temporarily down)
How to Purchase Doujinshi (a guide from solelo)
Shoujo-Ai Forum
Tokyo Wrestling (articles in English, Japanese, and French on lesbian culture in Japan, including interviews with Yamaji Ebine and Takeuchi Sachiko)
Yuri ML
Yuricon
Scanlation-related:
Apollyon (doujinshi translations)
Baka-Updates Manga (manga database)
Bijou Blade (scanlator that does the BeruBara Kids manga)
Compilation of Manga Editing Tutorials (from Franky-House's forum)
Daily Manga (manga database)
Dynasty (scanlation team that does some yuri manga)
The Evil Empire (general scanlation hosting site and forum)
Horobi no Michi (scanlator that does some yuri manga)
Inside Scanlation (a site about the history of scanlation; also has a list of guides)
Kotonoha (scanlation team that does a few yuri manga)
Lililicious LiveJournal community (release announcements, reviews of yuri manga, recs, etc.)
MakiMaki (scanlator that does a couple of yuri things)
Manga Jouhou (manga database)
NanoFate.us (scanlation team devoted to Nanoha doujinshi)
Otenba (scanlation team devoted to yuri manga)
Scanlationshop (handy program for translators--combines an image viewer with a text editor)
Screentones
Tokudane (release announcements for BL and yuri scanlations; now known as Kisha Club)
Tranquil Spring (scanlation team devoted to yuri manga and doujinshi)
Trine Scanlations (scanlator that does some yuri manga and doujinshi)
Wings of Yuri (yuri manga scanlations and game translations)
Yuriko-chan's Translation Blog (yuri manga and doujinshi scanlations)
Yurizoku (adult yuri manga scanlations)
Yurizuki.net (descriptions and teaser scans of yuri scenes from various manga, along with http downloads of a few yuri manga scanlations and assorted goodies; run by Rosa_Chinensis)
Zefiberyl Translations (yuri scanlation duo)
Yuri game translations:
Akai Ito
Amaranto (summary only)
Aoi Shiro
Katahane
A Kiss for the Petals (Sono Hanabira Ni Kuchiduke Wo)
A Midsummer Day's Resonance
Sapphism no Gensou (and blog)
Webcomics:
Absolutely True Tales of Lesbian Drama
Arkaedea
Automaton73
Barefoot and Pregnant
Bitter Girl (alternate link)
Blood and the Art of Baking
Bold Riley and the Witch in the Wild (see also The Legend of Bold Riley)
Burgundy Comics, INC.
Curvy
Dimension
Dykes to Watch Out For
Empathy
Feathers
Flaming Destiny
Flipside
Fun in Jammies
Gay Balls of Fire
Girl Trouble
Girly
The Good Prince
Gun Street Girl
HEARD
Heliothaumic
Hold Me Tight
House of the Muses
I Bruise Easily
Inamorato Sister
I Was Kidnapped By Lesbian Pirates From Outer Space (from the artist of YU+ME)
Jane's World
Juxtapose
Khaos Komic
Kris Dresen Comics & Illustration
Liliane, Bi-Dyke
Listen to Yer Mama
The Lounge
Mistah Dyke
My Dream For Gaia
My Fake Heart
Mysteries of the Arcana
Mystican Dreams
My Utopia
Nicola & Belmondo
Nowhere Girl
Oddcases
Otenba Files
Paradox
Pastel
Pawn
Plastic
Politically InQueerect
Punch an' Pie
Sister Claire
Starcrossed
Stitches
Taiki
Touche
Venus Envy
Wendy
When She Was Bad
Why Me?
The Wings of Juano Dioz
Yoko+Mamiko
YU+ME (also see Soulmates, a short one-shot by the same artist)
Blogs:
Hontou ni Sou Omou? (English)
Ichigo Aji-Yuri Tendou (English)
Lesbian Manga & Yuri Manga Reviews (Japanese)
Okazu (English)
Rosa Chinensis (English)
Sachiko (English)
Small Call (Japanese)
This Lesbian’s Guide to Anime and Manga (English)
Yasashii Sekai (English)
Yuri Findings and Works (English)
Yuri Kokoro (Japanese)
Yuri na Hibi (Japanese)
Yuri no Boke (English)
Yuri Nikki (Japanese)
Yuri Yuri! (Japanese)
Livejournal (and other) communities:
Berusaiyu no Bara (Rose of Versailles)
Daily Yuri (daily postings of yuri manga and other comics with lesbian content; must join the community to view posts)
Garden of Maidens (Maria-sama ga Miteru)
Lililicious Mixi community (Mixi is a Japanese social networking site)
Lillian Jougakuen (Maria-sama ga Miteru)
Lily-School (Thai community; includes fansubs)
Marimite 100 (short Maria-sama ga Miteru fanfiction)
Oniisama e
shoujoai100 (general yuri fanfiction challenge)
strawberi_sweet (Strawberry Shake Sweet community)
Sweet Blue Flowers (Aoi Hana)
Tales of Lillian (Maria-sama ga Miteru fanfiction)
Très Cher Frère (French Oniisama e forum with an English board)
Yuri (general yuri)
Yuri Drabbles (short yuri fanfiction)
Image boards:
2chan (Japanese)(adult)
4chan (adult)
iichan/wakachan
Yamibo (Chinese) (English guide)
Maria-sama ga Miteru:
Bara no Yakata (Japanese-language directory of Marimite sites)
D-poisonous BLUE (website of Hibiki Reine, illustrator of the novels)
Google image search for "Maria-sama ga Miteru" in Japanese
Maria-sama ga Miteru board at the AnimeSuki forum
Maria-sama Ga Miteru Forums
Maria-sama ga Miteru Novel English Translation Project
Marimite Oekaki Board (Japanese)
Marimite Official Webpage (English)
Marimite Official Webpage (Japanese)
Marimite Search (Japanese directory of Marimite sites)
Marimite Story (info on the novels and links to novel translations)
Marimite Wiki (Japanese)
Mooncanvas >> Maria-sama ga Miteru
White Petals (Rosa_Chinensis's translation of the SeixShiori arc of the third novel)
Yuri manga in languages other than English and Japanese:
Asuka (French publisher that has put out French translations of several of Yamaji Ebine's yuri works as well as Shimura Takako's Sweet Blue Flowers and Ikeda Riyoko's Oniisama E)
Fireangels Verlag (German publisher that puts out a yuri anthology; non-German artists are allowed to submit manga as well)
Yuri Doujinshi at Animexx.de (German webcomics and online doujinshi)
Queer women in other media:
After Ellen
The A-Z LGBT Comic Book Character Superlist Comic Book Lesbians
The Gay League (queer comics resource)
Prism Comics
Strange Sisters (lesbian pulp novel covers)
Queer resources:
365 Gay (queer news)
GLBT National Help Center
I'm Here. I'm Queer. What the Hell do I Read?
OutProud
Queer YA: Fiction For LGTBQ Teens
Youth OUTreach
#lililicious IRC channel related:
#lililicious stats
#lililicious HP femslash links
