Dinotopia.com is the impressively detailed one-stop site for all your Dinotopian needs.
Gurney Journey, the art blog of the man himself.
The Original Message Board is where Dinotopian fandom tends to congregate these days.
FanFiction.net’s Dinotopia Section has the most fanfiction in one place but most of it is miniseries-related and written by younger fans.
Archive of Our Own’s Dinotopia Section is tiny but has better spelling and grammar.
Cryptic Memories, Vira Redclaw’s site – great layout!
Parasauropolis is still around. Kie, a parasaurolophus, built a site so you can walk through some of Dinotopia’s capital city and listen to audio files.
Sanctuary of the Clans is Nimbus’ site and well worth a visit with a message board, lists of clan members, roleplay work, and a story-in-progress. It’s easy to read and worth a visit.
C’xsann Clan-site is the home cave system of a raptor pack. Like most caves, it is an adventure to walk through, a choose-your-own adventure type of layout.
Boojinko’s Outer Island is the territory of a Utahraptor and the Oojin Raptor Guild. Roleplaying abounds here, with plenty to read and explore.
City of Mists was Azonthus’ huge collection of fan works, from art and stories to poetry and archived roleplays. The contents of this library rival the Great Library itself, which is quite something because you can fit an apatosaurus in there. Highly recommended.
Sauropolis Beath was RustFeather’s site of collected fanfiction and her art.
Ximuun’s Lair was a site that included a message board but, alas, is no more.
Dinotopia Roleplay was a message board-style round-robin storytelling roleplay. As of June 2012, there were a couple of fans still having adventures.
Office of Earth Sciences and Research was a gorgeous project of watercolor and digital images and projects, research, and information.
Pooktook was a vast collection of information about Dinotopian culture and holidays.
Dinotopia MUCK was a playable text roleplay game in the western half of Dinotopia.