The complete contents of the 12-volume Jewish Encyclopedia, which was originally published between 1901-1906. The Jewish Encyclopedia, which recently became part of the public domain, contains over 15,000 articles and illustrations.

I knew about this but had never seen an explanation before.

Online exhibitions include Jewish boxers, Jewish identity in America, etc.

More than 3 million Jews lived in Poland in 1939; site created to preserve the memory of those millions who suffered and perished. Genealogical research, Holocaust information, etc.

Resource for online learning. Contributors include the British Museum, New York Public Library, etc. Topics include Judaism, biodiversity, Shakespeare, women's studies, 9/11 before and after, and more.

Jewish genealogy software is also full-featured.

Official site of the Auschwitz-Birkenau Memorial and Museum in Oswiecim, Poland.

Who's who in Jewish rock music, Jew or not quiz, merchandise to buy, etc. [via yahoo daily wire]

Personal gateway to Jewish exploration. Information on rituals, customs, ideas, and culture. [via the webby awards]