Glade Interface Designer

Glade Interface Designer is a graphical user interface builder for GTK, with additional components for GNOME. In its third version, Glade is programming language–independent, and does not produce code for events, but rather an XML file that is then used with an appropriate binding (such as GtkAda for use with the Ada programming language).

Glade is free and open-source software distributed under the GNU General Public License. Glade's development and maintenance ceased in 2022, with the final release on 10 August 2022. Provided by Wikipedia