Yes sir! NWN Diamond can now be downloaded for FREE at the Good old Games (gog.com) site for the coming 48 hours!
Tell your friends! Tell everyone! Lets get some players back into this game :)
Edit: https://www.gog.com/news/the_amazing_world_of_neverwinter_nights_mods
Very nice! I think this is the link you will want though
https://www.gog.com/game/neverwinter_nights_diamond_edition