Tcl/Tk, Expect.
Cameron Laird's personal notes on online Tcl tutorials
comp.lang.perl.tk FAQ
Tcl
Cookbook
Expect Home Page
Frequently Made Mistakes in Tcl
NeoWebScript
Perl/Tk Documentation
Safe-Tcl
Tcl/Tk Plugin
Solitaire
Tetris
Video Poker
Scriptics: the Tcl company
Standard Tcl Library (tcllib)
Tcl for Web Nerds
TclX
TCL WWW Info
tkMOO-light for UNIX, Windows and Macintosh
"Why you should not use Tcl"
Pointer into a 410K archive of messages from comp.lang.tcl. Stallman's denunciation of Tcl and the discussion that ensued.
Tcl'ers Wiki