Tcl Programming
Tcl is a scripting language created by John Ousterhout. It can be used interactively, or by running scripts (programs) which can use a package system for structuring, hence allowing to do much with little code. This book discusses the GUI toolkit Tk in considerable extent, even though it's not in the title. For most users, Tcl/Tk form a single conceptual entity.
Author(s): wikibooks.org
NA Pages 
The tutorial is intended as a companion to the Tcl manual pages which provide a reference for all Tcl commands.
Author(s): Clif Flynt
NA Pages
Practical Programming in Tcl and Tk
We are working on the detailed description of this book, we will update this section soon.
Author(s):
Pages
