Dennis Frank's Lord Kalvan site - This site includes a Kalvan concordance, it also includes photographs of those places in the novel Dennis has been able to identify with reasonable confidence.

H. Beam Piper List - this is a forum for the discussion of the works of science fiction author H. Beam Piper.

The Lance and Longbow Society - the world's premier medieval interest society.

The Renaissance Wargaming Society - the society's purpose is to help advance the hobby of Renaissance miniatures wargaming.

The SF Site - news and reviews of science fiction and fantasy books.

Science Fiction Timeline Site - Jerry Pournelle's Future History forms a unified projection of a possible "future" based on Pournelle's vision of sociology and politics.