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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.
Iceraven for Android
There is one other web engine called Servo, for other people interested in new web rendering projects, but it's far from complete (maybe development even stalled, I'm not sure). An interesting project, but definitely shouldn't be used as a main web browser just yet. I've yet to check it out fully though.
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.