homepage at http://freewrap.sourceforge.net/ The freewrap program turns TCL/TK scripts into single-file binary executable programs.
There are various forms of this application - from wrapping pure-tcl scripts to wrapping tk and I believe even tk + certain extensions. The pure Tcl version--freewrapTCLSH--generates an executable that's typically just over a quarter of a megabyte.
Alex [Vizantinos?] provides a recipe [L1 ] for reverse engineering a Freewrap-ped application. Dennis follows that up with a simple counter-recipe for use of a private encryption key.
Latest version (5.6) gives up source code encryption [L2 ].
MG notes on May 12th, 2005 that a v6.0 seems to be available, since the start of the year, according to the download's page. It uses Tcl 8.4.8.
See also tbcload and Freedelivery
In a world with Starpacks, mktclapp, and so on, what's the point of freeWrap? One benefit is that freeWrap builds in BLT.