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Vita-Account-Manager
Switch between multiple PSN/SEN accounts on a PS Vita or PS TV. Handle execution history. Dump console IDs. Save and restore WLAN settings.
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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.
In the pinned post, there's a nifty homebrew called Simple Account Switcher. If you want an app that goes beyond what you need and offers more functionality, go with Vita Account Manager.
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.