All WordPress themes come with widgets, some more than others but there are some really good plugins that can be installed to enhance or "widgetize" your site or blog too. My favorites are "Widgetized Pages Light", Sidebars and Widget Manager" and "Custom Widgets".
These plugins give me unlimited widgets and choices for laying out my content that I wouldn't want to do without. They have become standard and essential tools for all of my WordPress sites.
