Source : Free On-Line Dictionary of Computing

tcl-debug
     
        A debugger for {Tcl} by Don Libes  that
        can be easily embedded in other applications.  It is included
        with many other Tcl libraries.
     
        {(ftp://ftp.cme.nist.gov/pub/expect/tcl-debug.tar.Z)}.
     
        (1994-10-31)