The Locus Index to Science Fiction
- Bibliographical database of novels and short stories published after 1983. From the US trade journal for the genre.
- http://www.locusmag.com/index/

Chronolgy of the Great Ark
- Attempts to reconcile various literary SFF universes into a common time-line.
- http://www.sicambria.com/

Lunacat.net
- SFF books written by women. Broken down by author and type of story.
- http://www.lunacat.net/books/index.htm

Utopian and Dystopian Theses and Dissertations
- Listing of around 2000 theses and dissertations about SFF utopian and dystopian literature.
- http://www.csulb.edu/~lswigart/sfftd.html

Islam and Science Fiction
- Resource on Islam as it appears in science fiction books and cinema.
- http://www.cs.rit.edu/~maa2454/SCIFI/

Index to Science Fiction Anthologies and Collections
- Database of anthologies and single-author collections published before 1984, from William Contento.
- http://contento.best.vwh.net/

Bibliography of Mormon Speculative Fiction
- Works published by or about Mormon SFF writers, including novels, short stories, articles, and interviews.
- http://www.mormonsf.org/

Religion in SF/F Literature
- Includes c. 2000 references to real churches, religions, and tribes in science fiction novels and short stories.
- http://www.adherents.com/lit/index_adherents.html

Jewish Science Fiction and Fantasy
- List of SFF novels and shorter works somehow certified kosher.
- http://www.sfsite.com/~silverag/jewishsf.html

Classics of Science Fiction
- Site devoted to identifying the classic books of science fiction.
- http://classics.jameswallaceharris.com/

Uchronia: The Alternate History List
- Annotated bibliography of novels, stories and essays involving the 'what ifs' of history.
- http://www.uchronia.net/

Transformation Stories List
- Books and stories with shapeshifting (werewolves, and nanotechnology) as a theme. Searchable, with brief descriptions and reviews.
- http://www.transformationlist.com/

Steampunk
- Portal for SFF - includes links to author websites, and direct links to online texts.
- http://www.steampunk.com/

The Moon in Science Fiction
- Bibliography of SF novels dealing with the moon.
- http://home.earthlink.net/~paltner/moon/sf_moon.html