Dragon Sorcerer's Lair
An introduction to Pern, who's who on Pern, and Pernese dragons versus others.
Dragonriders of Pern Fan Site
Aside from the mandatory bibliography this site also has a "Pern Purity Test", map of Pern, "Dragonquotes" and other interesting sections.
Robin Wood
Robin Wood painted the People of Pern for Anne McCaffrey's companion book to the Pern series
Sabria's Guide to Pern Online
Lists guides riding straps, rank knots, debunking the dragonrider myth, So You Want To Be a Goldrider, and other Pernese information for role playing.
Sariel's Guide to Pern
Whether you are new to Pern or a long-time fan, this archive of information is interesting as well as useful.
The Wonderful World of Pern
A fan site with details on life on Pern and links to fandom and other Pern sites.