[...]
Steve Cassidy: "Trf lets you zip up a bit of data but doesn't provide the machinery to zip directories or files. mkZipLib <http://mkextensions.sourceforge.net/ > provides such an interface as does zvfs <http://www.hwaci.com/sw/tobe/zvfs.html >. More up to date is the zipvfs package which is part of tclvfs but that doesn't seem to be working cleanly yet and requires tcl8.4 features."
http://www.equi4.com/critlib/zipper.README http://www.equi4.com/critlib/zlib.README