SpecTcl GUI Buillder SpecTcl Tutorial TCL - E.J. Friedman-Hill's Tcl Course TCL - Graphical Applications with Tcl and Tk TCL http--www.beedub.com-book-2nd-booktoc.mif.html Tcl 8.0 and Tk 8.0 Tcl Extensions Tcl-Tk 8.1, BLT 2.3-8.1 http--hermes.desy.de-pink-pinkall.html