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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.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
Very happy with pass.
For the first question: https://keepassium.com/
I didn't think KeePass was something to be self hosted, but I found this: https://github.com/keeweb/keeweb
Also everyone here might want to look at vaultwarden (formerly bitwarden_rs). It's an implementation of the Bitwarden server written in Rust. It allows you to have all of the premium features for free.
I believe the server is open source too: https://github.com/bitwarden/server