Glade (GTK+3 User Interface Builder) 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 stored in XML format, enabling easy integration with external tools. This version of Glade (Glade-3) is a complete rewrite of the original Glade codebase. Please note that this version is different than glade3 provided by Slackware, which is glade3-3.8.3 for GTK+2; this package is for GTK+3.