-
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.
The inthe.am is not closed-source. It's open-source, released under AGPL-3.0, with source code available here: https://github.com/coddingtonbear/inthe.am
The most active Android app that I'm aware of (that is also open source) is Foreground: https://github.com/bgregos/foreground
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.