TclTutor : Interactive Computer Aided Instruction for Tcl
TclTutor is a computer aided instruction package for learning the Tcl language. It consists of 43 lessons covering all of the basic Tcl commands and most of the recent (8.0) additions.
Tcl/Tk is the user-friendly way for anyone to produce GUI "windows" applications. A Tcl script does not need to be compiled to be used yet provides much more power than a "bat" file or shell script.