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bufler.el
A butler for your buffers. Group buffers into workspaces with programmable rules, and easily switch to and manipulate them.
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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.
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torus
Switching buffers and buffer groups at will in emacs. Based on MTorus : rewritten from scratch
I don't know if this is what you're after, but what about https://github.com/alphapapa/bufler.el?
I use https://github.com/muffinmad/emacs-ibuffer-project, which (as the name suggests) automatically groups buffers in ibuffer by their project. If you use the cache, as described in the README, it's quite fast.
Many, many years ago I wrote mtorus which provides a way of creating groups of markers (not buffers) and then cycling through those groups and the markers within. A ring of rings, hence a torus. I haven't really used it for a long time, but you can find it at https://github.com/ska2342/ska-init-files/tree/master/dot.emacs.d/lisp and https://www.skamphausen.de/cgi-bin/ska/mtorus .
If you're looking for a newer implementation inspired by the idea of mtorus, you may want to give https://github.com/chimay/torus a try. Chimay is also active in this subreddit.