This package contains [incr Tk] version 3.0.1.  [incr Tk] is a
companion to [incr Tcl] and builds a ``mega-widget'' framework into
Tk. The [incr Tk] extension is also known as ``itk''.

A companion to [incr Tk] called [incr Widgets] provides a widget set,
with many improved widgets. The [incr Widgets] collection is also known
as ``iwidgets'' and is available in x11-toolkits.

WWW: https://sourceforge.net/projects/incrtcl/