Tolkien
I was for two years the secretary of Taruithorn, the Oxford Tolkien Society. I’m particularly interested in Tolkienian linguistics.
Here are some useful resources:
Eldamo:
Probably the most up-to-date website on Tolkien’s language constructions, including several (well-founded and extensively debated) neologisms. eldamo.org
Ardalambion
A somewhat dated, but still useful website – interesting articles on the lesser-developed languages (Valarin, Adûnaic, Black Speech…) folk.uib.no/hnohf/
The Tolkien Ensemble
Has through several decades set Tolkien’s poems and songs to music. http://www.tolkien-ensemble.net/index_en.html