Evolution Sidebar Box is a WordPress plugin by AndreasHecht that creates a new and simple to use widget that adds a sidebar box with recent posts, last comments, categories, popular posts, a tag cloud and the archives to the sidebar. No Options.
This widget is perfect for light-colored themes.
WordPress Widgets add content and features to your Sidebars. Examples are the default widgets that come with WordPress; for post categories, tag clouds, navigation, search, etc. Plugins will often add their own widgets. Widgets require no code experience or expertise. They can be added, removed, and rearranged on the WordPress Administration Appearance > Widgets panel.