WebZines
Analog SF Magazine Home page of long-lasting sci-fi magazine
Asimov's Home page of the magazine named for the great master himself
Dragon Page Unique SF/Fantasy radio talk show with an online feed
Science Fiction & Fantasy World One of the best on-line zines
Science Fiction Studies Zine with academic resources from DePauw University
Scifind UK speculative fiction site with DVD news and reviews
ScifiSlacker Speculative fiction news and reviews site
SciFiSpace Speculative fiction site with news, info, chat room, etc.
SF Signal One of the best speculative fiction blogs out there
SF Site Comprehensive, informative and well-written webzine
Syfy Home page of the genre's popular cable television channel
365 tomorrows Collaborative site publishing a new piece of short speculative fiction each day

General Reference
AudioBooksForFree Free sci-fi audiobooks including a handful of classics
epguides.com An index to episode guides for sci-fi/fantasy TV shows
Feminist Sci-Fi Linked bibliography of feminist sci-fi, fantasy and utopia resources
Internet Movie Database Lots of info about films of all kind, including sci-fi
Internet Speculative Fiction DataBase Massive database of genre literature
Locus online Extensive database, news, reviews, award info & links
Quiet Earth Dedicated to genre film and all things post apocalyptic (Doesn't that sound like fun?)
Saturn Awards Sci-fi awards organisation focussing on film and television
Sci-Fi Movie Page Movie & DVD Reviews, trailers & clips,  and news on upcoming movies
Science Fiction & Fantasy Writers of America Pure sci-fi class with no dross
SF Booklist A good user-friendly sci-fi/fantasy bibliography
StackExchange A collaboratively edited question and answer site
Technovelgy.com Where science meets fiction in classic SF literature
Ultimate SF Web Guide A vast, but aging collection of sci-fi resources
Variety SF A blogspot specialising in sci-fi literature, with plenty of short fiction
Wikipedia SF Television On-line encyclopedia with lots of info on sci-fi TV
(See also Wikipedia SF Films and Wikipedia SF Novels)

Search Engines/Directories
DirectoryScifi Well organised online science fiction directory.
SciFi Source Comprehensive directory of sci-fi sites
Speculative Vision Good directory covering all speculative fiction genres

Other Lists
AbeBooks 50 Essential Science Fiction Books (in their opinion)
Amazon 100 Sci-Fi & Fantasy Books to Read in a Lifetime
ArtsForge Sci-Fi 100s Artistic community site with sci-fi books and films lists
BestScienceFictionBooks Website's opinion of the best sci-fi books
Boston Globe TV 50 A one-at-a-time SFTV top 50, starting at the end
Carver Recommended Author Jeffrey A Carver lists his SFF recommendations
Classics of Sci-Fi Survey of sci-fi books and short stories from James Wallace Harris
David Pringle Critical list from 1985's 'Science Fiction: The 100 Best Novels'
Flickchart All-time best sci-fi movie list from interactive website
Goodreads Best Science Fiction Well-maintained sci-fi book list aiming for genre purity
Goodreads Listopia Best Science Fiction books of the 21st Century, also after genre purity
IGN IGN's version of the top 50 sci-fi TV shows of all-time, with a slight surprise at #1
IMDb Feature Films Sortable list of the top sci-fi feature films with at least 1000 votes
IMDB TV Shows Sortable list of the top sci-fi TV shows with at least 1000 votes
Internet Top 100 Science Fiction and Fantasy List from the revival of the original site
Locus All-Centuries Top short fiction and novels poll results from 2012
Metacritic Movies Sortable list of the top sci-fi flims by metascore
Metacritic TV Shows Sortable list of the top sci-fi TV shows by metascore
NPR's Top 100 Top 100 sci-fi/fantasy books based on a 2011 poll by NPR
Ranker The Greatest Science Fiction Novels of All Time as voted by site visitors
Rotten Tomatoes Movies Top 100 Science Fiction and Fantasy Movies
Rotten Tomatoes TV 100 Best Sci-Fi TV Shows of All Time
TV.com List of the Top 100 sci-fi TV shows as voted by TV.com visitors

The 1950s
Public Domain Torrents Download cheesy public domain sci-fi movies and serials for free
Solar Guard Comprehensive 1950s sci-fi TV site and discussion page

Clubs & Other Stuff
Denver SFF Book Club Informative site run by prolific readers
New England SF Association Another book club with a good core reading list
Recommended Links
The best of the net and a dose of listmania
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