Ancients and Cultures
Ancient Mathematicians of Africa http://www.math.buffalo.edu/mad/Ancient-Africa/index.html
Ancient Math Webquest for 6th Graders http://www.saintmike.org/NRamig/Numbers%20Through%20Time%20Webquest.htm
Ancient Math History by Culture (this site is an absolute treasure trove of info)
Ancient Babylonian mathematics
Ancient Egyptian mathematics http://www-gap.dcs.st-and.ac.uk/~history/Indexes/Egyptians.html
Ancient Greek mathematics http://www-gap.dcs.st-and.ac.uk/~history/Indexes/Greeks.html
Indian mathematics http://www-gap.dcs.st-and.ac.uk/~history/Indexes/Indians.html
Chinese mathematics http://www-gap.dcs.st-and.ac.uk/~history/Indexes/Chinese.html
Incan mathematics http://www-gap.dcs.st-and.ac.uk/~history/HistTopics/Inca_mathematics.html
Arabic mathematics http://www-gap.dcs.st-and.ac.uk/~history/Indexes/Arabs.html
Mathematicians B4 500 AD http://www-gap.dcs.st-and.ac.uk/~history/Indexes/_500_AD.html
Abacus Links
Number Bases
Mayan Math for Kids