NBC: Friends:Official site. Includes information about the program, cast biographies, episode guide, pictures and credits.
Warner Bros: Friends:Official site which includes episode guides, character biographies, a message board, and multimedia. [Requires JavaScript.]
EpisodeList.com : Friends: Offering an episode list with synopsis and character appearances.
Friends: Episode guide, show information, and discussions, from About.com.
Friends Cafe: Features pictures, news and spoilers, multimedia downloads, games, and trivia.
Friends On TV: Episode guide, games, actor biographies, and virtual tour of the Friends neighborhood and set. [Flash]
Friends Trivia: Large collection of Friends trivia quizzes.
Ground Zero: Friends vs. Seinfeld: It seems that both groups want the same couch.
IMDB: Friends: Cast and plot information.
TBS Superstation - Friends: The story, cast, images, TBS episode schedule, clips, and daily trivia.
The Complete Friends Script Index: Episode scripts of all seasons.
TV.com: Friends: Episode guide with summaries, cast and crew, goofs.