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TorBox
TorBox is an easy to use, anonymizing router based on Raspberry Pi, which also runs on Debian and Ubuntu based systems.
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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.
Also, we are exploring the possibility to create a Raspberry Pi USB TOR-stick with a Raspberry Pi Zero W (see here). This is probably, what you are looking for. However, we are not there yet.
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.