Yesterday I released the API/ABI-stable gtkmm 2.20.0.
Some GNOME friends recently suggested that we should hype gtkmm more, and the applications that use it. I think they want us to use meaningless phrases like more-productive, ground-breaking, state-of-the-art, etc. I won’t do that, but it’s nice to note that gtkmm has now tracked the GTK+ 2 API for 7.5 years, and has officially followed the GNOME release schedule for 6 years. It is the pure C++ GUI toolkit that you can depend on, if you like that kind of thing, while still easily using other standard tools and APIs. Its ongoing development is entirely open.
It will help you write code that works and that you understand better. It won’t help you “just” write code in 10 times less time, or with 10 times less bugs, but nothing can because software development is difficult and likely to remain difficult.