   Qt
  Is it possible to compile the Trolltech Qt open source with VC++ 2005?  It's designed to compile under MinGW, but any tweaks around?   
  I am pretty sure that VS is only for owners of a commercial license.   ;  Yes you can, but it's not officially supported. I had had much success with using Qt-Win:http://qtwin.sourceforge.net/qt3-win32/compile-msvc-2005.php;  Just checked again and it appears that official Visual Studio support has been added to Qt 4.3.2 and above.   