xoscope for Linux
http://www.yann.com/en/diy-turn-your-gnulinux-computer-into-a-free-oscilloscope-29/09/2010.html
http://www.elecfreaks.com/2042.html
http://www.yann.com/en/diy-turn-your-gnulinux-computer-into-a-free-oscilloscope-29/09/2010.html
http://www.elecfreaks.com/2042.html