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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.
SMS Backup+ (https://github.com/jberkel/sms-backup-plus) uses an IMAP connection to back up messages to a folder in a mailbox, and can also restore to a new phone (restore SMS only, not MMS/RCS). Can also add phone calls to your Google Calendar as entries. Can use any IMAP account, but defaults to GMail. Requires setting an application password for GMail access. Advantage: View and search messages within your email account.
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.