FB-3200 is a software instrument for Microsoft Windows (VST) and Apple macOS (VST/AU) simulating the KORG PS-3200 Polyphonic Synthesizer from 1978. It is written in native C++ code for high performance and low CPU consumption.
vPlayer 2 is a standalone software developed for quick testing new vst/au instruments without the need to use any DAW. But also for playing a quick loading jam session using your favourite instruments, playing up to 4 instruments at same time using up to 4 different keyboards and processing each intrument output through an effect plugin.
Poly-LD8 is a free very Poly-800 inspired VST synthesizer Instrument, will bring the Poly 800 Sound on your 32bit Daw.
Lazerwave is a free VST Synth Triangle Wave based, waveshaping Polyphonic Synthesizer with a spacy touch. It can make many kinds of sounds you may find usable for your Productions.