There are 3 repositories under vst3-host topic.
🎛 🔊 A Python library for audio.
Digital Audio Workstation with Python; VST instruments/effects, parameter automation, FAUST, JAX, Warp Markers, and JUCE processors
DSP servers using general purpose computers and networks
A JUCE-based Open Source DAW
Cross-Platform Vst Host
Directly Musical Data Access.
Simple audio units (MIDI FX, Instrument and Audio FX) made with JUCE, that can host a single VST3 plugin
Каркас модульного синтеза для создания свободных кроссплатформенных DAW и других свбодных программ.