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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.
Not sure if this is what you're looking for, but I came across this awesome little tool called lnav (Logfile Navigator) that might be of interest: https://lnav.org/
https://github.com/WithSecureLabs/chainsaw if you're just looking for bad stuff.
NOTE:
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Hence, a higher number means a more popular project.