mo0kid wave is a free, open-source emulation of the Waldorf Wave, the German company's flagship hybrid wavetable synthesizer from 1993. Rather than approximate the Wave with modern DSP, it emulates the machine itself: an emulated 68000 CPU runs the original operating system, and a second runtime executes the genuine WDV voice-board program, modeling the ES2 oscillator ASIC and CEM3387 filters along the way.
It offers 48 voices across three modeled cards and builds as a standalone app and AU, VST3, and AAX plugins on macOS. It is developed by Dave Whiting, also behind the MD and MM emulator, and it requires you to supply the original Waldorf firmware. For the full breakdown, see the mo0kid wave first look.