- Appaloosa Interactive - The official website of the creators of Ecco the Dolphin, covering information on their greatest videogames - including Ecco games.
- DARK SEA : The Ultimate Ecco the Dolphin Resource - Ecco DARK SEA was founded to provide fans with all information and multimedia available in regard to these classic games, including their development.
- Ecco the Dolphin - Wikipedia - Very thorough description of the complete Ecco the Dolphin series with a great introduction and information about each of the games.
- Ecco the Dolphin Forum at GameTalk - A forum to talk with other ecco fans about anything like help and codes to even descussing problems.
- Ecco the Dolphin: Caverns of Hope - An Ecco the Dolphin site covering a lot of topics with an ever-growing amount of information about the games and related stuff. News and Downloads can be found here, as well as a growing community.
- Ecco:DoF guide - Half completed walkthrough for ecco:dof that has the orginal feature of being available both in english and french.
- Ecco-le-dauphin - A french Ecco the Dolphin site with a fan art work section and forum.
- GameFAQs: - Ecco: DoF Forum - Forum where you can talk to other ecco fans, there are also a large number of ecco resources there such a faqs.
- Tim Follin's Burial Site - The creator of the music in Ecco the Dolphin: Defender of the Future presents exerpts from the music on his personal website.
- yivdesign - A website with many wallpapers designed by an ecco fan.