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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.
I advise my family to use the incredible password manager Bitwarden. With the free version, you can store the TOTP secrets (the QR codes simply contain a string of characters) directly in the entries. With the PRO version ($10/year), Bitwarden can use the TOTP secrets and generate the codes itself, without needing an app on your phone.
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Hence, a higher number means a more popular project.