gtk3-nocsd is a small module used to disable the client side window decorations (CSDs) in GTK+ 3, which are used by many GNOME applications. A shared library is included which can be loaded with LD_PRELOAD to override several Gdk and glib/gobject APIs used by GTK+ 3 to set up CSDs. A wrapper script is also included, which can be used as follows: gtk3-nocsd gedit