Nana C++ Library takes aim at easy-to-use and portable library, it provides a GUI framework and threads for easy programming with modern C++ methods, such as traits, metaprogramming and other template technologies. http://sourceforge.net/p/nanapro/blog
You can report a bug anonymously by using "Tickets" in the top bar.
This nana C++ GUI Library has a really great future. I've tried it myself and was impressed with what it can accomplish. Now I think we need more examples in the help folder of the source code that actually compile. I said this because some of them either have no example, or they have it but don't compile. This can scare new-comers away, and we don't want to do that. Overall great project and bright future!
The first C++ GUI library that has and supports Standard C++ style (including C++11 features). There is no need to learn new programming styles of GUI like Wxwidgests or Qt. No need in additional interpreter like in Qt. Simply use your preferred C++ compiler and write code using Standard C++ features and style: like inheritance, virtual function, templates and much more. It's not a FaceBook but I click Like.