Glade
a User Interface Designer
Glade is a RAD tool to enable quick & easy development of user interfaces for
the GTK+ toolkit and the GNOME desktop environment.
The user interfaces designed in Glade are saved as XML, and by using the
GtkBuilder GTK+ object these can be loaded by applications dynamically as
needed.
By using GtkBuilder, Glade XML files can be used in numerous programming
languages including C, C++, C#, Vala, Java, Perl, Python,and others.
https://glade.gnome.org/
Development