The primary package referred to as Pool is [Pool (Kupries)].

 Where: http://www.purl.org/NET/akupries/soft/pool/ 
        http://www.purl.org/NET/akupries/soft/pool/download/pool2.2.tar.gz 
 Description: A personal library of Tcl procedures.  Requires Tcl/Tk 8.x.
        Contains calendar widgets, date, string, list and file manipulation
        functions, option processing routines, url manipulation and
        extraction routines, yet another OO (object-oriented) tcl based
        system, and megawidget support.
 Updated: 11/1999
 Contact: mailto:andreas_kupries@users.sourceforge.net (Andreas Kupries)

 What: Pool (Leunissen)
 Where: See contact
 Description: Tcl only package for managing pools of discreate items.
 Updated: 06/2002
 Contact: <URL: mailto: e dot leunissen at hccnet dot nl >