Center for Gender Equity of the University of California, Berkeley. Provides advocacy, education and support services to both women and men of UCB. Several other universities have similar centers - google "Center for Gender Equity".
bills itself as 'The internet for women', seems to have lots of women's health information.
Mariah Women -
MARIAH'S women-only trips combine active river wilderness adventures with exploring the natural and cultural environments of unique International destinations in the safe and secure company of other women!
Launched in 2001 to improve girls' education and women's empowerment throughout the world. Has a programmatic focus on girls' and women's issues to ensure equal access to life's opportunities as well as national economic growth and overall human development.