Layout Containers

GtkAlignment
GtkAspectFrame
GtkHBox
GtkVBox
GtkHButtonBox — A container for arranging buttons horizontally
GtkVButtonBox
GtkFixed — A container which allows you to position widgets at fixed coordinates
GtkHPaned — A container with two panes arranged horizontally
GtkVPaned
GtkLayout — Infinite scrollable area containing child widgets and/or custom drawing
GtkNotebook — A tabbed notebook container
GtkTable — Pack widgets in regular patterns
GtkExpander — A container which can hide its child
GtkOrientable — An interface for flippable widgets