Balmora Expanded is one I really like. It's a sort of mega-mod, made of smaller mods by a couple of the best Morrowind modders out there. They got approval from other mod creators to incorporate all the extra stuff in Balmora. From the readme:
**Balmora Expansion includes the following new mods created specifically for it:
*Vonhelira's Metal Queen Boutique by CanadianIce, featuring all new fashions for both male and female players. Special thanks also to MP*Canus and Brady226 for the textures of some of the male versions of the robes in the boutique. For all those who pleading for a second store, your pleas have been answered.
*The Breton Knight by Jeremy featuring not only all new armor styles but also Jeremy's first store designed specifically for selling his awesome works.
Plus the new stuff I created. (You have to figure out those yourself, can't give away all the surprises).
***Balmora Expansion incorporates the following mods that should be unchecked in the MW data files list if you are currently using them:
Balmora Manor
Balmora Zoo
Balmora Bathhouse
Balmora Museum
Morrowind Abodes (Your Balmora Residence.esp only)
Dave's Furniture Store Plug-In v1.6
Lysandrus
Quivers and Fletching Kit
Wyr Jewelers
Carry your Bedrolls
DEJ Pocket Watch
Magic Backpacks
Nyagetan
Healers
WeaponPack2
ThievesGarb (Black Clothing)
Dark Club Mod 1.1
Ranger Robe
Sheikizza Aedric Armour Collection V01
Sheikizza Daedric Armour Collection V1.0
***Balmora Expansion includes elements of the following mods customized for use with this mod. The original mods can still be used in conjunction with Balmora Expansion and will function normally:
LadyE's display cases, spider webs ad jewelers sign
Dongles Musical Instruments
Gorg's Flowing Capes
Forgottens Longbow Pack
Elements from Silgrad Tower (concepts for several of the new shops I created (such as the hospital and restaurant) came from this inspired work)
House of Mannequins v1.0
Tenience's Rare Items
Particle Weapon Merchant Mod
Pack Animal Merchant
Lovemod
Heavenly Pleasures
Legolas Gear
The Regulars 2.02
Carnithus Armamentarium & Add-On I
LichLair V1.1
Darkstone Manor
Britneys Secret v1.1 (Oops, I did it, it was too funny)
(used the faces only)
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That's a lot of stuff. It doesn't work well on a slow system with low RAM, but if you've got a reasonably decent system with 500 MB RAM, then it should run pretty well. There's also a version that strips out extra statics to increase running speed.