Tcl and the Tk Toolkit (PDF 142P)
Covered topics are: An Overview of Tcl and Tk, Tcl Language Syntax, Variables, Expressions, Lists, Control Flow, Procedures, Errors and Exceptions, String Manipulation, Accessing Files, Processes, Managing Tcl Internals.
Author(s): John K. Ousterhout
Tcl Tutorial
The tutorial is intended as a companion to the Tcl manual pages which provide a reference for all Tcl commands.
Author(s): Clif Flynt
Advanced Tcl (PDF 186P)
This note describes advanced TCL programming techniques that support sophisticated applications.
Author(s): Yuanzhu Chen