wxFormBuilder

Juan Antonio Ortega Ryan Mulder Ryan Pusztai Michal Bliznak wxFormBuilder is an open source GUI designer application for wxWidgets toolkit, which allows creating cross-platform applications.

[2] A streamlined, easy to use interface[3] enables faster development and easier maintenance of software.

wxFormBuilder is a visual development tool, but also allows including non-graphical components.

[4] It can generate C++, Python, PHP, Lua and XRC code.

Events can also be added through external XML files, eliminating the need to rebuild.