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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.
Nobody will tell you exactly what private companies are doing, but for a tool that’s not hopelessly outdated, you can check out Berkeley’s abc project.
Here is just a small list of passes, with their source code: https://github.com/YosysHQ/yosys/tree/master/passes/opt.
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.