abot's Water Life (available at MW Summit)
Water Life is an attempt to mix the scripting techniques developed in the "Where are all birds going?" plugin with the best aquatic creature modding resources to bring more life into Morrowind waters.
This plugin adds to Morrowind (most) peaceful aquatic creatures based on the wonderful models & textures by Cait Sith, Lady Eternity & Proudfoot, Brash.
I have found it to have done much more than that though
adds a fully fledged fishing system and skill
I have yet to get to grips with it, but it looks superb. "Where are all the birds going?" is also an excellent mod
Children of Morrowind by
Emma Homepage
Adds children (babies, toddlers 'n' teens) to locations across Vvardenfell... with interaction options, voiced dialogue and much more
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Galsiah's Character Development (GCD)
Homepage
GCD changes Morrowind's levelling system to make it seamless. Limits are removed from skills and attributes, and skill gain is slowed down exponentially to preserve game balance. Skills influence attributes, health and magicka directly.
Characters remain diverse throughout the game, with strengths and weaknesses dependent on initial skill choices, skill increases and racial factors. Includes optional magicka regeneration. Easily and extensively customizable (see readme).
GCD works on non-GCD saved games. (though you'll have to go through a fairly boring data entry process the first time yu play with a character).
I've found this to be an excellent mod... get over your initial xenophobia or something that so radically changes the game system and GCD proves to be an excellent mod. It increases the difficulty of the game and slows down character development significantly, but appropriately