Layout Containers

GtkAlignment — A widget which controls the alignment and size of its child
GtkAspectFrame — A frame that constrains its child to a particular aspect ratio
GtkHBox — A horizontal container box
GtkVBox — A vertical container box
GtkHButtonBox
GtkVButtonBox — A container for arranging buttons vertically
GtkFixed
GtkHPaned
GtkVPaned — A container with two panes arranged vertically
GtkLayout
GtkNotebook
GtkTable
GtkExpander
Orientable