Purdue's Virtual Reference Desk is really a list of good Web reference resources. Reference Page from the Internet Public Library has many useful links that are well organized and annotated. All disciplines are covered. Information Please Sources lets you search the Information Please Almanac, the Columbia Encyclopedia, and the Random House College Dictionary, and a few other sources either separately or together.
Users can select whether they want to search article titles or full -text.
Good for statistics, biography, current affairs, geography, sports. Reference works include the Columbia Encyclopedia, Roget's II Thesaurus, Grays Anatomy, Farmer's Cookbook, and many other works. Biography Biography Page has 15K entries for historical and current subjects, all fields, and is international in scope. Entries are only 150 words, but have links to related biographies. You can browse or search for a person.