Also exist Frozenfire's Race Addon, The Withering Kind, Warcraft III: Nirvana.
First one lets play naga. Fine and quality. The only defects are bug, that hinders calling militia, wrong hotkeys, little balance issues, concerning in particular lack of AoE dispell and invisibility detection, and flubbing AI, specially its wrong healing waters ability usage.
The Withering Kind is unfinished, as developers emphasize. I am acquainted only with an alpha version and not sure the project is still in development. Accurate job. Lets play blood elves.
Now Warcraft III: Nirvana is in development. The latest is beta version with the 2nd patch. Adds naga, ice trolls and blood elves.