What about SimulAnalog Guitar Suite? It is a freeware and no profit set of plugin. Born as a test bench for SimulAnalog research, we saw that without any effort it could be distributed to musicians that may find it useful. That's why it is given as is, with no support and with a very rough user interface.
But we can assure that "every component in the audio path of the original instrument has been modelled, except for the secondary effects of some active devices" and that "the response of each original device have been compared with the respective simulated response, obtaining less than -40dB of difference" without any particular commercial interest saying that.
Output
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