Center for Law and Social Policy (CLASP) - http://www.clasp.org - A national non-profit organization which seeks to improve the economic security of low-income families with children and secure access for low-income persons to the civil justice system.
The Co-operative Development Association - http://www.codas.org - A national organisation that seeks to promote the benefits of co-operatives to governments and communities alike and to assist in their establishment, particularly in rural areas.
Foresight Institute - http://www.foresight.org - The Foresight Institute's goal is to guide emerging technologies (especially nanotechnology) to improve the human condition.
Give For Change - http://www.giveforchange.com - Find nonprofit groups working for social change. Hundreds of groups to choose from and provides a secure environment to donate to nonprofit groups online.
GuideStar - http://www.guidestar.org - Free service with information on the programs and finances of more than 650,000 American charities and nonprofit organizations.
Alliance for Justice - http://www.afj.org - A national association of environmental, civil rights, mental health, women's, children's and consumer advocacy organizations.