Rohan - Discussion board with quizzes and RPG. - http://www.landofrohan.com/forum/
Tolkien and the Inklings Forum - Michael Martinez's discussion forum for scholarly debate on Middle-earth. [Ultimate Bulletin Board] - http://www.sf-fandom.com/vbulletin/forumdisplay.php?s=&f=32
Tolkien's Readers List - Email-based discussion list about J.R.R. Tolkien and his works. - http://www.tolkienlist.net/
LOTR Forum - BBS to discuss the books and movies. - http://www.lotrforum.com/
The Message Halls - Online Tolkien community for fans of J.R.R. Tolkien, the Lord Of The Rings and Middle-earth. - http://www.tolkienet.com/rivendell/forum2/forum/default.asp
Ithilien - Home of the Loughborough High School Tolkien Society. - http://lts.proboards23.com
Boards of Lorien - Discussion forum with a Lothlorien theme. - http://majestyoflorien.proboards26.com
Halls of Quenta - Lord of the Rings fan fiction community. - http://www.andontie.net/hallsofquenta
The City of Arda - BBS system based in Tolkien's fictional City of Arda. - http://www.cityofarda.com/
The Argonath - Discussion board for Lord of the Rings fans. Includes the movies, books and role-playing. - http://thelotr.proboards21.com/
LOTR Forums - Community system dedicated to LOTR and Tolkien. Also has fan art and news. - http://www.lotrforums.com/