One of my favorite C++ libraries these days is called Wt (pronounced as 'witty'). It enables you to write AJAX web applications from C++, with the similar widget-based architecture as Qt.

Visit my page about Wt for the customary 'Hello Wt' program, articles and much more information: http://richelbilderbeek.nl/CppWt.htm

Or view the website I developed with Wt at http://www.richelbilderbeek.changeip.net