Serum - VST for FL Studio, Ableton Live, and many other VST supported DAWs. Heavily utilized in EDM.
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
Korg Legacy Collection - Korg Legacy Collection is a suite of VST instruments that acts as an audio plugin software for integrating synthesizers and effects units into your digital audio workstation.
AmpliTube - Guitar Amp & FX modeling plug-in • Amp, Stomp, Cabinet + Mic, Rack FX modeling
SynthMaster One - Powerful, universal wavetable synth with an intuitive workflow.
Ampire - State Space Modeled guitar amp/cab/stompbox simulator.