tcl-dp

from The Free On-line Dictionary of Computing (8 July 2008)

Tcl-DP

   Tcl-DP extends {Tcl}'s "send" by removing the restriction that
   you can only send to other clients of the same X11 server.
   Version 3.0 library by Larry Rowe.

   (ftp://toe.cs.berkeley.edu/pub/multimedia/Tcl-DP).