While there aren't any official Korg Triton VST plugins available for free, there are some third-party options that aim to recreate the magic of the original synthesizer:
Modern producers value speed. The Triton VST allows a user to load a "Combi" (combination patch) and have a fully produced beat (drums, bass, keys) ready to play. This "instant gratification" workflow is a legacy feature that remains relevant for sketching ideas quickly. korg triton vst free
Independent developers have created free DecentSampler (.dspreset) instruments that mimic Triton combis. While there aren't any official Korg Triton VST