The free ones sound good to
Fav's are Lepou Amp's and LeCab, Auraplug California Sun, Ronald Passion Revolutionz, Acmebargig Dig 2.0 , Shred 1.0 , Simulanalog Guitar Suite Gui Version http://requietus.blogspot.com/2008/12/simulanalog-guitar-suite-gui.html
Cab Impulses...