The primary package referred to as Pool is [Pool (Kupries)].
However, see also [tcllib]'s struct::pool package.
Hopefully someone will add some information about the tcllib version here on this page.

The documentation for the tcllib struct::pool package can be found at: http://tcllib.sourceforge.net/doc/pool.html and contains some nice examples.

[NEM] Don't forget [TkPool]! ;)
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