The following links are to online university research databases or other consortiums and archives that provide access to original source material.
Fordham Internet History Sourcebooks: An excellent collection of links to primary sources in all periods and regions of world history. We'll use this a great deal in our course http://www.fordham.edu/halsall/
South Asia Archives
University of Chicago South Asia Collection (digital links) http://dsal.uchicago.edu/
Columbia University South Asia Collection (digital) http://www.columbia.edu/cu/lweb/indiv/southasia/cuvl/
Al-Biruni's India (complete digital copy of the 12th c text) http://www.columbia.edu/cu/lweb/digital/collections/cul/texts/ldpd_5949073_001/index.html
East Asia Archives
Roman and Greek Sources