A quick scan of sourceforge gives a bunch of projects whose name begins with tcl.  I'm going to trawl through them all.

   * http://tcldp.sourceforge.net/
   * http://tclines.sourceforge.net/
   * http://tcl-qt.sourceforge.net/
   * http://tcltk.sourceforge.net/
   * http://tcladdressbook.sourceforge.net/
   * http://tcldrop.sourceforge.net/
   * http://tclinux.sourceforge.net/
   * http://tclral.sourceforge.net/
   * http://tcltkaqua.sourceforge.net/
   * http://tclads.sourceforge.net/