[...]
Steve Cassidy: "Trf lets you zip up a bit of data but doesn't provide the machinery to zip directories or files. mkZipLib [L1 ] provides such an interface as does zvfs [L2 ]. 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
See also Using a zip file as a Tcl Module.