Spynergy

A pure-Tcl toolkit, created by Steve Wahl and Michael Doyle, and included with the BOOK Interactive Web Applications With Tcl/Tk. It provides a set of procedures for distributed processing, URL retrieval, HTML rendering, database management and platform independent file managment. It was developed to be compatible with Tcl 7.6 through 8.0, but hasn't been updated since then. The tools all seem to work fine with current versions, though.