Wikipedia
Philanthropedia
Philanthropedia, a division of GuideStar, is an expert crowdsourcing resource for funders and others to learn about high-impact nonprofit organizations. The site features more than 11,000 reviews from 1,400 experts who are interviewed and surveyed. The site also features rankings based on a combination of in-depth surveys and conversations with experts, including academics, funders, grant makers, policy makers and consultants.