Nature Photographers Network – A community for nature photographers
forums
EA Forum
Effective Altruism research, discussion and community updates
LessWrong
A community blog devoted to refining the art of rationality
GitHub - ForumMagnum/ForumMagnum at devel
The development repository for LessWrong2 and the EA Forum, based on Vulcan JS - GitHub - ForumMagnum/ForumMagnum at devel
Squat the Planet
Squat the Planet is the world's largest social network for misfit travelers. Join our community of do-it-yourself nomads and learn how to explore the world by any means necessary.
The Fountain Pen Network
The Admin Zone
Resources for Forum Administrators!
WonderCafe2
A home for discussion of the big questions
Boardreader - Forum Search Engine
Find A Forum - The Ultimate Directory of Internet Discussion Forums
Discover Online Communities
Hive Index is a directory of online communities, organized by topic, platform, and community features.
Forum-List - The Best & Biggest List of Forums on the internet!
Forum List is a list of only the very best forum websites on the internet: computer forums, sports forums, video game forums webssites, and more!
Expedition Portal
Largest and Oldest Overland Forum
Wander The West
Wander The West is a community that love to explore the expanses of mountains, deserts and forests of the Western United States. The West is a vast place, filled with more amazing places to explore than most could see in a lifetime.