Tcl has had this capability for a very long time: http://wiki.tcl.tk/1055 http://wiki.tcl.tk/1055 Tkcon (http://wiki.tcl.tk/1878 http://wiki.tcl.tk/1878) makes

Tcl has had this capability for a very long time: http://wiki.tcl.tk/1055 http://wiki.tcl.tk/1055 Tkcon (http://wiki.tcl.tk/1878 http://wiki.tcl.tk/1878) makes use of the various methods Tcl provides to great effect.