You can easily embedd internet explorer frames in winforms and WPF. If you're using Visual studio its almost a drag and drop affair. To gain things like system

You can easily embedd internet explorer frames in winforms and WPF. If you're using Visual studio its almost a drag and drop affair. To gain things like system wide notifications you will need to use interop to get to the win32 libs, but its fairly straight forward and well documented. As far as I'm aware (and I'm speculating from articles I've read) is that full support for HTML apps is coming in Windows 8. EDIT: or just use the other link provided in the other comment which has webkit support :)