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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.
Tk is one of the most mature guis for Perl. There are others. I am trying to dig up a page with some links by my google-fu is weak this morning. (clickclickclick). Ah! http://perl-begin.org/uses/GUI/. There is also this: https://github.com/saiftynet/GUIDeFATE. Not sure what state it is in these days. If you want to see what can be done with TK, check out Devel::ptkdb.
NOTE:
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Hence, a higher number means a more popular project.