Probably the most popular mod for the original Mount & Blade v1.011 - now also for Warband!
I try my hardest to dislike this mod. Be it what looks to me to be crappy support and rude responses or the fact that I like the movies better (burn the heretic :P), reason after reason falls through as I play. I've logged more than one hundred and fifty hours on this masterwork of a mod, finished six or seven different playthroughs. Its turning coding into an art form has inspired me to begin work on my own mod for M&B. I will be honest, and you can vilify me all you like: from what I've seen, your responses to questions have been snarky, rude and moderately Tolkien-elitist when applicable. But this isn't a customer service review, and I'm not a customer. I have great respect for the work that these people have done out of the kindness of their heart and their own free time, and it truly is magnificent. The only reason that I won't give this a perfect score has already been mentioned, but rest assured that this is and was rightly deserving of the #1 mod slot.
This is the mod every fan of Middle Earth must have. Huge map, nice armors, good representation of orcs and uruk-hai, battles with powerfull trolls, spider's embush, etc.
The only thing is that it's impossible to manage villages or cities, or to make a siege yourself.