Every list and document library in SharePoint comes with a number of forms pages (allitems.aspx, ...). Although unsupported by Microsoft (read more here why not), adding Web parts on the pages is possible. And you do not have to use FrontPage 2003 or dive into the site definitions to accomplish this. Simply add the ?ToolPaneView=2 right after the URL and your Web part tool pane will be activated giving you the possibility to add your favorite Web part to the pages. But do remember, you are doing something unsupported :-)