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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
It's a much better alternative to YouTube for mobile not just in terms of privacy but also features: https://github.com/TeamNewPipe/NewPipe
Newpipe is amazing. Personally I've switched over to Libretube which became usable for me as of v.0.3. It's on v0.3.1 now and development seems to be picking up steam.
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.