For going through History Of Mathematics, I have gone through various videos, documents and websites as below
http://www-history.mcs.st-and.ac.uk
http://ancienthistory.about.com/
http://it.stlawu.edu/~dmelvill/mesomath/obsummary.html
http://www.enotes.com/topic/
http://en.wikipedia.org/wiki/Approximations_of_%CF%80
http://www.storyofmathematics.com/
http://www.archimedes-lab.org/numeral.html
http://en.wikipedia.org/wiki/Prehistoric_numerals http://it.stlawu.edu/~dmelvill/mesomath/erbiblio.html#MCT
http://recursostic.educacion.es/descartes/web/materiales_didacticos/A_history_of_Mathematics/Mesopotamia.htm
http://www.math.ubc.ca/~cass/courses/m446-03/pl322/pl322.html