http://www.lucindawilliams.com/
her collection Car Wheels on a Gravel Road is a classic.

oh, and Wendy Waldman, and Carol Elliot, and Mary McCaslin,
and...Sarah Elizabeth Campbell...and Anne Hills, Cindy Mangsen,
Kathy Mattea, Joan Baez, Julie Gold, Dolly Parton, Sally Van Meter,
Dar Williams, Lucy Kaplansky.....

Karla Bonhoff and Julie Miller and Tammy Fassaert and k.d. lang