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PasswordPusher
🔐 An application to securely communicate passwords over the web. Passwords automatically expire after a certain number of views and/or time has passed. Track who, what and when.
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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.
You can view a demo of it here (or just use this one if you are comfortable with it): https://pwpush.com/
I'd consider PrivNote fine or OneTimeSecret.com. OTS also provides its source, so you could run your own version in-house if you want more control over it.
We are currently using yopass at our company and are really satisfied with it. You can either set it up directly on your linux server or just use docker.