Encyclopedia of Genealogy
In December of 2004, Dick Eastman formulated a free online service for genealogists called the Encyclopedia of Genealogy.
"The Encyclopedia of Genealogy serves as a free compendium of genealogical tools and techniques. It provides reference information about everything in genealogy except people. Look to the Encyclopedia of Genealogy to provide explanations of how to look up your family tree. It will also provide explanations of terms found in genealogy research, including obsolete medical and legal terms. In addition, it will describe locations where records may be found. Within a few months, this online encyclopedia will describe how to research Italian, German, Polish, French-Canadian, Jewish, Black, Indian, and other ancestors. In short, the Encyclopedia of Genealogy will serve as your standard genealogy reference manual."
Dick Eastman created the framework of this encyclopedia, and genealogists around the world have been submitting articles over the past 8 months. The encyclopedia works just like wikipedia or wiktionary, which basically means anybody who sees an error or wants to change something to an entry can do so.
Here are some examples of the articles this encyclopedia offers:
GEDCOM
Family History Library
Pedigree Resource File
Social Security Death Records
MyFamily.com