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<a name="id-1.3.37.9.8.2"></a>libsigc++</h4></div></div></div>
<p> <a href="http://libsigc.sourceforge.net" target="_top">libsigc++</a> is a C++
      signals &amp; slots library that originally started as part of
      an initiative to wrap the C interfaces to <a href="http://www.gtk.org" target="_top">GTK</a> libraries in C++, and has
      grown to be a separate library maintained by Karl Nelson. There
      are many similarities between libsigc++ an