Go to Ancestry.com. Then click on Search at the top and then Card Catalog. Now type in the keyword Women.
Some results are not obviously "women-centered" but as you scroll down the various hits, wonderful resources for research become obvious. Consider searching such great finds as:
The records of the American War Mothers (Detroit, Michigan)
Daughters of Utah Pioneers and Their Mothers
Women of Cleveland and their work
The social mirror : a character sketch of the women of Pittsburg and vicinity during the first century of the county's existence
Women and the trades : Pittsburgh, 1907-1908
FindMyPast announced for International Women's Day that they have added some databases to trace female ancestors including: British Women's Royal Air Force Service Records 1918-1920 and British Women's Royal Naval Service Officer Files 1917-1919. You can read more about this announcement on their blog.
So what's the big take-away from this? Don't limit your searches to a name. Explore the website you search for collections that deal with places, events, and organizations.