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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.
So far as I know Chez is not a variation on Guile, it's a scheme implementation similar to Guile, and so far that I can see Guile is more active, with more community and more package ecosystem , and looks like Chez is/was a cisco project, not sure how is the development process there, but Guile looks like more active in terms of commits https://git.savannah.gnu.org/cgit/guile.git, the last one in "main" is 3 weeks ago vs may 23 https://github.com/cisco/ChezScheme/commits/main.
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.