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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.
It's not the easiest to just pick up and run with, but Ardour's the best open source DAW I've come across. Installers for Windows are available for a donation on their site (with no minimum), or they can easily be found on Archive.org.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.