Source : Free On-Line Dictionary of Computing

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)}.