Guitarix team http://www.guitarix.org/
99+ Pedalboards using it

GxCabinet

Plugin screenshot
Simulator

Control Default Min Max
Cabinet 1.00 0.50 5.00
Bass 0.00 -10.00 10.00
Treble 0.00 -10.00 10.00
Cab Model 0 0 18
SCHEDULE 1 0 1
http://guitarix.sourceforge.net/plugins/gx_cabinet#CABINET v.1:28.3-20