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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.
I've never tried having neovim provide this feature, but if you are okay with having another program provide it you might have a look at tmate. It is a tmux fork providing builtin sharing capabilities that I quite like.
I followed https://github.com/FredKSchott/CoVim for a bit, but it died. Sadly because it is now archived I can't find the linked neovim issue ticked with some proposed functionality that would have made CoVim be able to work better and be more stable.
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.