Ashoka Innovators for the Public Good: https://www.ashoka.org/fellows List of leading social entrepreneurs who have been recognized for their innovative solutions to social problems and the potential to change patterns across society. Ashoka Fellows work in over 70 countries around the globe in every area of human need.
Schwab Foundation for Social Entrepreneurship: http://www.schwabfound.org/entrepreneurs
Skoll Foundation: http://www.skollfoundation.org/skoll-entrepreneurs/
United Nations: http://www.un.org/sustainabledevelopment/sustainable-development-goals/ - an excellent resource for facts and figures on 17 areas of “grand challenges” faced by society from poverty to climate change. Also included are the goals which have set by the UN to help address these challenges and links to other resources in these challenge areas (including some examples of solutions that are already underway.)