del.izzy is a free service that lets you search through your del.icio.us bookmarks. Wait a second, doesn't del.icio.us already let me do that? What's different about del.izzy? del.icio.us is a great service, but when you search through your bookmarks, you are only searching through tags, titles and descriptions, not the page content.
Dozomo is a quick way to reach 201 search engines! Just type the name of a search engine followed by a search term, and dozomo will take you there immediately.