I'm part of an online project making a total conversion for the strategy game Rome: Total War. It is set in JRR Tolkien's Middle-earth, after the end of the Lord of the Rings books in the Fourth Age (LOTR being set at the end of the Third Age)
It's called The Fourth Age: Total War and has a
whole load of
talented people working on it (and also me). It's got a demo out and we're expecting a release some time in september. It comes with my somewhat biased recommendation; those who do the hard work have created many brilliant things for me to write about.
It has a website and a new forum, both located at
www.thefourthage.org where you can also look at some of our work (in the Media section) and download the demo (in the Downloads section).
nb. You need R:TW to play it.