I've just scrolled through this thread and with the exception of C. Fox Smith, Linda Kelley, and Mary Garvey (I thought I posted her "Cannery Shed" but can't find it now) there are no other women composers mentioned. Maybe there aren't any more!

There is also Gina Dunlap's brilliant reinterpretation of the traditional shanty "River Lea."

There are the Johnson Girls, a favorite group of mine, but I don't think they've composed any songs.

Cheerily,
Charley Noble