WxFormBuilder

wxFormBuilder is an application that can literally speed up GUI development, being Python either C++ the programming language of your choice.

Installation
To install it, you need to first add the gentoo-zh overlay:

Then, since premake 3.7 is currently an ebuild prerequisite, though the core system is already providing premake 4, you have to directly specify it:

You may now proceed and install itself:

External resources

 * http://wxformbuilder.org