Many internet users turn to Wikipedia as a quick reference when they're looking for an overview of information or a starting point to seek additional sources. The article linked below lists 47 other valuable online references for individuals looking for information. One can never have too many reference options to compare and use as bridges to additional sources.
Suggested resources include the Encyclopedia Smithsonian, a collection of all offerings from the Smithsonian Museum. The site consists of more than two million records with accompanying image, video and sound files, electronic journals and other museum resources.
Also suggested is HyperHistory, a database spanning 3000 years of world history, presented with interactive timelines, graphics and maps.
See the full list of 47 information sources to use as Wikipedia alternatives here.