Science Fiction & Fantasy Writers of America, Inc.
The official website of the premier professional science fiction writer's association. The SFWA site contains membership information, links to members sites, markets, and sample contracts.
http://www.sfwa.org

Hobgoblin.net: Resources for Writers
A guide and community for writers of science fiction and fantasy with articles and links to resources in dozens of categories including research, inspiration and writing techniques.
http://hobgoblin.net/resources/

The University of Michigan's Fantasy and SF Home Pages
Main features of this site include a symbolism dictionary and an online library containing the full text of many science fiction and fantasy works.
http://www.umich.edu/~umfandsf/

Jeffrey A. Carver
Includes advice to aspiring authors, particularly in science fiction and fantasy and essays on writing. Also, a weblog about being a writer and other personal events.
http://www.starrigger.net/

Clarion
Information on the well-known science fiction and fantasy writing workshop held at Michigan State University from mid-June through July. Workshop and Alumni information, newsletter, workhop writers, contacts and staff.
http://www.msu.edu/~clarion/

Other Worlds Writers' Workshop
Workshop and bookstore for speculative fiction writers, explanations and examples of spec-fic genres, writing tutorials and critiquing.
http://www.otherworlds.net

Speculations
The online manifestation of an award winning electronic magazine called Speculations, which reports on SF/F/Horror markets including response times, articles and other timely insights.
http://www.speculations.com/

Speculative Vision Science Fiction and Fantasy
Rich resource site: writing resources, art gallery, TV and Movie MIDI music, interactive SF/F stories, forums, SF search engine.
http://speculativevision.com/

Robert J. Sawyer's "On Writing" Columns
Canadian SF/F writer's articles on writing, first published in "On Spec" magazine.
http://www.sfwriter.com/owindex.htm

A Scientist's Notebook
Monthly article by noted SF author Gregory Benford online at the Magazine of Fantasy and Science Fiction website.
http://www.sfsite.com/fsf/current.htm

Fables
Genre 'zine for sci-fi/ fantasy/ horror writers.
http://www.fables.org/index.html

DADA's Little Baby Namer
Name generator especially useful for generating unusual names for fantasy or science fiction characters or places.
http://www.doctornerve.org/nerve/pages/interact/dadababy.shtml

Suite101: Writing Science Fiction
Archive of writing Resources, publishing opportunities and contests relating to writing science fiction.
http://www.suite101.com/welcome.cfm/writing_science_fiction

Viable Paradise
This is an intensive one-week workshop, held annually in New England. The instructors are professional writers and editors. Both novels and short stories are considered and workshopped.
http://www.sff.net/paradise/

Black Hole Surfers
Science fiction and fantasy writers' resource featuring market contacts, peer review, research resources, discussion boards, book club.
http://groups.msn.com/BlackHoleSurfers

Online Writing Workshop For Science Fiction & Fantasy
Peer-review writing workshop for aspiring science fiction and fantasy authors.
http://sff.onlinewritingworkshop.com/

SpecFicMe!
a bi-monthly, PDF market newsletter for science fiction, fantasy and horror writers. Every issue features well over 200 markets, from e-zines to print magazines. Along with news about new publications, anthologies, contests, and dead markets.
http://www.specficworld.com/sfme.html

Sci-write Ezine
Monthly, read-only, newsletter detailing market changes, guidelines, and resources.
http://lists.topica.com/lists/sci-write/

Chronicles-Network Forums
Science fiction and fantasy writers' and aspiring writers' forums.
http://www.chronicles-network.net/forum/

SF Writer: Darren Johnson
Weblog with advice, thoughts, example excerpts and useful links from an SF writer.
http://doylebranton.blogspot.com/

David Walton's Writing Advice
A catalog of online speculative fiction writing advice, organized by category.
http://www.sfreader.com/authors/DavidWalton/

Adventure and Fantasy Writer's Forum
Ask for advice, and lend advice to others. For writers striving to create the perfect epic fantasy.
http://p209.ezboard.com/badventureandfantasywritersforum

Mary Soon Lee's Writing Speculative Fiction Page
Questions and answers on a variety of topics of interest to SF/F writers from this award-winning author.
http://www.cs.cmu.edu/~mslee/wr.html

Write SF
Free online course for young writers, created by SF author Jeffrey A. Carver. Covers the fundamental skills needed to write successful SF and fantasy stories.
http://www.writesf.com

Tribe: SF/ Fantasy Writers
A place for aspiring writers of science fiction and fantasy (and other stories that fall under the heading of speculative fiction) to talk about writing.
http://sfwriters.tribe.net/