I've recently started putting together a Tk-over-jQuery routine I'm calling web Tk (wtk). The idea is having full Tcl running on a server, with a Tk-like layer that sends commands to code running in a browser.
This page contains information relating to the core rules for the current Tcl interpreter. See
http://www.tcl.tk/man/tcl8.5/TclCmd/Tcl.htm
for the official page.
The Tcl/Java project's goal is to make integrating the Java platform and the Tcl scripting language as easy as possible. The project actually consists of two distinct packages, called Tcl Blend and Jacl. It is important to understand what each package provides and in what situations one might choose to use Jacl or Tcl Blend.