Sieve of Eratosthenes

http://britton.disted.camosun.bc.ca/jberatosthenes.htm

Sieve of Eratosthenes Applet

http://britton.disted.camosun.bc.ca/sieve/jberatosapplet.htm

http://www.win.tue.nl/~ida/demo/c1s4ja.html

http://nlvm.usu.edu/en/nav/frames_asid_158_g_3_t_1.html?open=instructions

Youtube: http://www.youtube.com/v/8On7yCU1EjQ