Here’s a classic amongst amp sim enthusiasts (free or otherwise), the roaring Legion high-gain amp simulator.
“This is an original design, it’s not based on any hardware gear. My goal here was to build a high gain sim that doesn’t need any booster in front in order to be tight.”
- 2 channels, actually two completely different preamp circuit
- 2 modes on each channel, rhythm and lead
- 2 tonestacks assignable to any of the 2 channels
- the usual drive and tone controls
It looks pretty kick ass too.