Sheri S Tepper is one of my favourite SF writers. She writes wonderful eco feminist novels and I always enjoy seeing any new book of hers. I have many of her books, but perhaps her most well known feminist fiction is The Gate to Women's Country, which besides featuring an interesting dystopia is very cleverly written, as are all of her books.
Six Moon Dance has an unusual dystopian society where men are forced to wear veils and serve the women who run all aspects of this society. The Family Tree is a lovely eco fantasy with a huge surprise half way through.
Next Grass, Northshore and Gibbons Decline And Fall
Finally, as far as feminist science fiction goes - Women of Wonder, a collection of stories by women writers including Ursula Le Guin, Vonda McIntyre, Kate Wilhelm among others.
Next - continuing with authors whose names start with "c"