-
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.
If you're just interested in backing up data, you can look at Borg in conjunction with Vorta. This allows you to back up data to an external hard drive, for example.
I hesitate to nominate any of them because (a) there are dozens or even hundreds of them and (b) I don't like any of them; I wrote my own because I needed a "hold" feature that no one had (i.e., when propagating changes to the repo, I want to hold back some parts of the change; https://github.com/sitaramc/notes/blob/master/dac.mkd explains better if you're interested
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.