- GtkSymbolicColor — Symbolic colors
- GtkGradient — Gradients
- Resource Files — Deprecated routines for handling resource files
- GtkStyle — Deprecated object that holds style information for widgets
- GtkHScale — A horizontal slider widget for selecting a value from a range
- GtkVScale — A vertical slider widget for selecting a value from a range
- GtkTearoffMenuItem — A menu item used to tear off and reattach its menu
- GtkColorSelection — Deprecated widget used to select a color
- GtkColorSelectionDialog — Deprecated dialog box for selecting a color
- GtkHSV — A “color wheel” widget
- GtkFontSelection — Deprecated widget for selecting fonts
- GtkFontSelectionDialog — Deprecated dialog box for selecting fonts
- GtkHBox — A horizontal container box
- GtkVBox — A vertical container box
- GtkHButtonBox — A container for arranging buttons horizontally
- GtkVButtonBox — A container for arranging buttons vertically
- GtkHPaned — A container with two panes arranged horizontally
- GtkVPaned — A container with two panes arranged vertically
- GtkTable — Pack widgets in regular patterns
- GtkHSeparator — A horizontal separator
- GtkVSeparator — A vertical separator
- GtkHScrollbar — A horizontal scrollbar
- GtkVScrollbar — A vertical scrollbar
- GtkUIManager — Constructing menus and toolbars from an XML description
- GtkActionGroup — A group of actions
- GtkAction — A deprecated action which can be triggered by a menu or toolbar item
- GtkToggleAction — An action which can be toggled between two states
- GtkRadioAction — An action of which only one in a group can be active
- GtkRecentAction — An action of which represents a list of recently used files
- GtkActivatable — An interface for activatable widgets
- GtkImageMenuItem — A menu item with an icon
- Stock Items — Prebuilt common menu/toolbar items and corresponding icons