Science Fiction Studies
- Website contains all article-abstracts and full texts of all reviews published in the journal since its founding in 1973, as well as featured essays, documents in the history of sf, and a bibliography of sf-criticism.
- http://www.depauw.edu/sfs/

Novelhead
- Original science fiction, humour and tips for writers.
- http://novelhead.blogspot.com/

Quantum Cosmos
- Bibliography, essays and literary writings by Douglas A. Mackey, as well as reviews of books on physics and consciousness.
- http://www.quantumcosmos.com/

Classics of Science Fiction
- Identifying the classic books of science fiction.
- http://classics.jameswallaceharris.com/

Science Fiction and Society
- Discusses science fiction and its ties to human culture and social issues. Features new articles weekly, discussions, polls, and links.
- http://www.suite101.com/welcome.cfm/sf_and_society

Her World Exploded
- Essay taking the view that science fiction is about how you read a story, not how it's written.
- http://public.logica.com/~stepneys/sf/explode.htm

Tonya's Sphere of Influence
- A brief historical survey of women writers of science fiction.
- http://www.cwrl.utexas.edu/~tonya/Tonya/sf/history.html

Kittywompus Tracks Fanzines
- A weblog providing critical reviews of paper and electronic SF fanzines.
- http://www.kittywompus.com/fanzines/reviews

Science Fiction Research Bibliography
- An extensive bibliography of printed reference material related to science fiction deemed valueable for research into the subject, from books available at Washington State University's Holland Library.
- http://www.wsu.edu:8080/~brians/science_fiction/sfresearch.html

Definitions of Science Fiction
- More than fifty definitions of science fiction from authors.
- http://www.panix.com/~gokce/sf_defn.html

Council for the Literature of the Fantastic
- A very scholarly approach to fantastic literature.
- http://www.uri.edu/artsci/english/clf/index.html