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quakestarter
Discontinued A package with tools for setting up a playable Quake installation and downloading/playing/managing many highly-regarded addons.
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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.
If you want any already curated list, my Quakestarter package has menus for installing highly-rated Quaddicted stuff, broken down by "era" of release. But it's for Windows, so, hmm. If you want to peek at what those menus are installing without actually running it, you could look at the batch scripts here (not the ones that begin with an underscore).
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.