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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.
For me particularly I like it for things like APIs, Web Platforms (lower resource usage than other languages), and embedded devices via Nerves. However I've also used it on my endpoints to monitor them via Erlang's built in os_mon. Another usage is the distributed nature of erlang can allow you to do things like connect two nodes and run code on a remote node via remote procedure calls. This would allow you to execute something in a nearby geolocated node and reduce latency. Fly.io did a talk on this feature.
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