La Leche League International (LLLI) is an International Non-profit organization. Started in 1956 by only 7 women in Illinois, LLLI now boasts thousands of chapters and helps women in over 60 countries.
LLL Leaders are volunteer mother-to-mother breastfeeding counselors. Leaders run monthly support groups, and answer breastfeeding questions and concerns by phone and email as well. The LLLI site (linked above) has extensive resources for breastfeeding, as well as a store with books, nursing bras and more.