I'm a software engineer. There are illusive projects to develop and
extend the vocabulary of the elvish language (Quenya has about 3000
words). These extended languages take various names: Neo-quenya being
the earliest attested, Vinquenya, Neo-eldarin, et al.
http://en.wikipedia.org/wiki/Neo-Eldarin_literature
I'm sure there are other members of this list that have more specific
resources that they would like to promote.
Kris