I've just checked my archive and here what I found:

- American TW
- Ancient TW
- Arthur TW
- Dark Age TW
- Hellenic TW
- Pike & Musket
- Redux
- Samurai Warlords

Most of them you can find at atomicgamer. I haven't tried all of these so I'm not sure if they were finished. If you have problem with finding links for them let me know.
btw Middle Earth TW last version was really beta 0.71 with only custom and MP battles working. SP campaign addon was abandoned in alpha stage and had a lot of bugs.