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GtkGrid — Pack widgets in a rows and columns
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GtkAlignment — A widget which controls the alignment and size of its child
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GtkAspectFrame — A frame that constrains its child to a particular aspect ratio
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GtkBox — A container box
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GtkHBox — A horizontal container box
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GtkVBox — A vertical container box
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GtkButtonBox — A container for arranging buttons
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GtkHButtonBox — A container for arranging buttons horizontally
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GtkVButtonBox — A container for arranging buttons vertically
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GtkFixed — A container which allows you to position
widgets at fixed coordinates
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GtkPaned — A widget with two adjustable panes
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GtkHPaned — A container with two panes arranged horizontally
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GtkVPaned — A container with two panes arranged vertically
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GtkLayout — Infinite scrollable area containing child widgets
  and/or custom drawing
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GtkNotebook — A tabbed notebook container
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GtkTable — Pack widgets in regular patterns
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GtkExpander — A container which can hide its child
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GtkOverlay — A container which overlays widgets on top of each other
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GtkOrientable — An interface for flippable widgets