-
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.
One that isn't mentioned here is telegram. It has quite large communities. Some of those communities can be seen here https://github.com/hendisantika/List-All-Programming-Telegram-Group
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.