Jarrod's new texture mod
http://www.rpgplanet.com/morrowind/modpics/jarrod2.jpg
Oh my
This mod replaces most of the textures in the game, with a truly brilliant result. This screenshot looks incredible. Before you download it, make sure you have at least a 64 mb graphics card.
Roads to Heaven http://www.rpgplanet.com/morrowind/modpics/BC_road.jpg
Another texture mod, this one replaces all road textures with sharper, more detailed ones. Again, you need at least a 64 mb graphics card to play this mod without a huge framedrop.