Baen Books: Baen is the specialist science fiction imprint started by Jim Baen. Site has a free e-books archive of their authors' in-print works

In Defense of Science Fiction: An essay on science fiction and literature by critic and science fiction historian John Clute

Locus Online: The online version of the leading news and review magazine of the science fiction, fantasy, and horror publishing fields

Recommended SF: A non-definitive guide to good SF and fantasy

SF Site: Science Fiction Author Links: Collection of author links, sorted alphabetically for convenience

The Hugo Award: Worldcon's listing of all recipients of the Hugo