Simulador de microcontroladores AVR e ST62 .
Free e muito útil.
http://www.amctools.com/cgi-bin/joinmail.cgi
http://www.amctools.com/vmlab314.zip
E tutores (eng)
http://www.amctools.com/vmlab_en.exe
http://www.amctools.com/usercomp.pdf