-
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.
Doesn't need to go to a website; you can have "digitally signed" QR codes that aren't forgeable/crackable, like QC/BC/SK/ON are using and work offline. Because of the way it works, you can actually see BC's app's sourcecode.
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.