http://www.cpn.org/tools/dictionary/capital.html

For a comprehensive description of social capital and practical examples.

http://www.bowlingalone.com

This site explores the question, "what is social capital, what does it mean and how does it work?"  Take a closer look at Robert Putnam's book 'Bowling Alone'.

http://www.worldbank.org/poverty/scapital/index.htm

This web site is the World Bank’s link with external partners, researchers, institutions, governments and others interested in understanding and applying social capital for sustainable social and economic development.

http://www.ksg.harvard.edu/saguaro/

The central premise of this social capital site is that social networks have value. Social capital refers to the collective value of all "social networks" (who people know) and the inclinations that arise from these networks to do things for each other ("norms of reciprocity").