The Open Source Zone

Glade is a free user interface builder for GTK+ and GNOME, released under the GNU GPL License

The user interfaces designed in Glade are saved as XML, and by using the libglade library these can be loaded by applications dynamically as needed. (Glade can also generate C code, though this isn't recommended for large applications.)

By using libglade, Glade XML files can be used in numerous programming languages including C, C++, Java, Perl, Python, C#, Pike, Ruby, Haskell, Objective Caml and Scheme. Adding support for other languages is easy too.