Characters
Ai Seguchi, Gravity, Heartless Writer, Occasionally Evil - Touma, OhK, Ryuichi Sakuma - Dedication, Ryuichi's Kumagorou Playground, Sakuma no Pika Pika, The Totally Biased Tohma Site, Trigger Happy
Best of Friends: A Gravi Site
A site dedicated to the anime Gravitation mostly Ryuichi and Kumagoro. Lots of screencaps, character profiles, yaoi fanfics or maybe non-yaoi fanfics (Submit yours!).
Dare to Dream
Story introduction, characters, episode summaries, essays, manga information and scans, buying information, kumagoro tribute, OVA information, multimedia downloads, images, fan works, and links.
Gravilicious
Clique for fans of the series, with rules, code, member list, and how to join.
Gravitation Anime
Gravitation fanart, animated gifs, manga pictures, episode lists, video clips, and realplayer files.
Gurabiteshiyon.net
A collection of fanfiction catering to multiple tastes and pairings. Read the work of others, or upload your own.
Inryoku: A Gravitation RPG
Inryoku is a LiveJournal-based RPG. Its intention is to dwell deep into the lives of your favourite characters, offering you a poignant glimpse into their minds and their hearts.
It's... Gravitation
Contains character profiles, manga summaries and translations, anime information, soundtrack information, image gallery, doujinshi, and a listing of various other merchandise.
Seven Days: Gravitation
Fan sub reviews, analysis and trouble shooting, CD information, and links.
Sleepless Beauty
Contains episode transcripts, fan fiction, character guide, and lyrics for the series.
Sleepless Beauty -- A Gravitation Site
Character biographies, seiyuu profiles, and mailing list.
Smashing Blue
Character descriptions, screencaps from the episodes, and information on where to get the manga, OAVs, and TV series.
Wild Radiance
Story summary, author information, synopsis and screencaps from each television episode, and links to other related websites.