Audio Units Soft Synth

The best VST/AU synth plugins 2021: the top analogue ...

https://www.musicradar.com/news/best-vst-synth-plugins

The Ultimate List of Audio Units - Retronyms

https://retronyms.com/audiounits/

Reason 11.1 Now Supports Audio Units - Synth and Software

https://synthandsoftware.com/2019/11/reason-11-1-now-supports-audio-units/

Now that Reason Rack Plugin is compatible with Audio Units, you can use any of Reason 11’s instruments, players, and effects in Apple Logic Pro or any DAW that supports VST or AU plug-ins. Today Reason Studios announced that AU support in version 11.1 makes Reason available to more DAW users, including Apple Logic owners.

Viking Synth

https://blamsoft.com/audio-units/viking/

Viking Synth is an Audio Unit Extension Instrument that works as a plug-in inside host apps. Just open up your favorite host that supports Audio Unit Instruments and select it from the list of available Audio Units. Compatible with GarageBand, Cubasis, MTS, and AUM. The user interface of Viking Synth is designed for quick and intuitive control.

Full Audio Unit (AU) Instrument App List (191)

https://synthyfrog.com/technology-is-audiounit/type-is-instrument/