Buttons and Toggles

GtkButton — A widget that creates a signal when clicked on
GtkCheckButton — Create widgets with a discrete toggle button
GtkRadioButton — A choice from multiple check buttons
GtkToggleButton — Create buttons which retain their state
GtkLinkButton — Create buttons bound to a URL
GtkScaleButton — A button which pops up a scale
GtkVolumeButton — A button which pops up a volume control