Considered academic alternatives to Google & Wikipedia, reference works such as encyclopedias, handbooks are a good place to find background information on a topic, or to quickly look up a fact. They often include bibliographies leading you to additional, relevant information.
Credo Reference provides access to a broad variety of reference sources from dictionaries to encyclopedias covering topics from the arts to the sciences. It has an image collection, maps, customizable data, and audio pronunciation files. You can search the whole collection or a specific subject area.
Following are freely available e-reference sources: