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nih-plug
Rust VST3 and CLAP plugin framework and plugins - because everything is better when you do it yourself
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
At least, https://github.com/robbert-vdh/nih-plug already gives many features for developing VST and CLAP. I know, it's not JUCE, and maybe it even doesn't want to be like JUCE in terms of GUI building blocks, but it makes very promising progress.
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