One of the United States greatest tools for aid and development is its citizens. According to the 2007 Index of Global Philanthropy by the Hudson Institute, in 2005, U.S. Private and voluntary organizations (PVOs) gave $13.4 billion to the developing world, international giving by U.S. foundations was $2.2 billion, and the value of volunteer time spent reached $2.8 billion. Volunteers can be leveraged internationally to provide incredible resources for your organization. The list below provides resources both for those who are looking to volunteer as well as for those who are looking to utilize volunteers in their organization.