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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.
In the end, the thing that will give the final sharpness to your CSS sword is - "The Specifications"! Specifications are the written documentation on each feature of CSS, by the people who build CSS! It covers every topic in-depth - upto details which then are also used by all the browsers to implement those CSS features. Reading these specifications give you the extra bit of understanding into why every features works the way it does.
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.