Ardalambion*Cool Site* - Essays on the tongues of Arda, Tolkien's youthful invented languages, glossaries, Elvish poems by other authors, linguistic discussions, and links to further resources.
Alcar Endóreo - Summary of the Quenya grammar, includes examples.
Appleyard's Black Speech Document - Plain text, in depth analysis of Tolkien's samples of the language, along with examples and explanations of created words and phrases.
Asea Aranion - Tolkien, his languages, and his books, with an English to Quenya dictionary.
Black Speech - Short encyclopedia article on Tolkien's Black Speech.
Eldalamberon - An irregularly published magazine, Parma Eldalamberon, which focuses on Tolkien's languages.
Elfling - Email list to further the scholarly study of the languages invented by JRR Tolkien and discuss the current state of research into Tolkien's languages.
Elfscript - E-mail discussion of J.R.R. Tolkien's orthographies and scripts, such as Tengwar and Cirth.
Elvish Linguistic Fellowship - An international organization devoted to the scholarly study of the invented languages of J.R.R. Tolkien.
Elvish Linguistics Mailing List - The Elfling list exists to further the scholarly study of the languages invented by JRR Tolkien.
Gwaith-i-Phethdain - Devoted to languages of Middle Earth. Grammars, dictionaries, essays and other resources, along with user submitted texts.
Hänäthlîêr: Sindarin Descendant - The language is a descendant of Sindarin and Quenya. The site has lessons, dictionary, alphabet, grammar and sounds.
Quenya An Yestandor - Quenya An Yestandor is a beginner's guide to Quenya. In addition to the grammatical and usage information, it is also home to the largest Quenya dictionary currently available.