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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.
Brave has written their own (open source) adblock engine (in rust) that is directly integrated into the browser (ie. not an extension, so is not affected by Manifest V3).
https://github.com/brave/adblock-rust
Here is a (somewhat dated) article describing it by the authors:
https://brave.com/improved-ad-blocker-performance/
NOTE:
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Hence, a higher number means a more popular project.