Blue Cat's Free Amp - The Free Guitar Amp Sim Plug-In (VST, AU, AAX, VST3) (Freeware)
IK Multimedia - AmpliTube 4
ZOOM G5N MULTI-EFFECTS PEDALBOARD AND AMP SIMULATOR FOR ELECTRIC GUITAR WITH EXPRESSION PEDAL - Woodbrass.com
GitHub - micbuffa/WebAudio-Guitar-Amplifier-Simulator: A Guitar Amplifier SImulator written using the Web Audio API. Online demo at: https://mainline.i3s.unice.fr/AmpSim