I find the Jewish Encyclopedia (1901-1906) to be an invaluable resource but alas it is quite old. Is there a similar but more updated encyclopedia available online anywhere?
The Encyclopedia Judaica, first published in 1971-1972, and updated as recently as 2007, is a bit more recent than Jewish Encyclopedia. While it isn't available online, many of its articles are available from Jewish Virtual Library (most of these articles have "Source: Encyclopaedia Judaica" at the bottom, but some articles from Encyclopedia Judaica are uncredited).
Also available is Universal Jewish Encyclopedia, 10 volumes (1939-1943) by Simon Cohen and Isaac Landman at The Online Books Page (onlinebooks.library.upenn.edu/).* After entering title, click 'Include extended shelves' when you get the result. Only volumes 2, 5, 6, and 10 have been digitized by Hathi Digital Library. Thus it is only partly comparable in usefulness to EJ.
The New Jewish Encyclopedia (1962) edited by Dr. David Bridger and Rabbi Samuel Wolk is accessible through Amazon.com's Look Inside feature. Ditto for The Shengold Jewish Encyclopedia (Revised 3rd edition; 2003) by Mordechai Schreiber and Leon Klenicki. These both are one-volume works and lack the scholarly bibliographies of the multi-volume JE, UJE, and EJ.
*The Encyclopedia of Jewish Knowledge (1934), a one-volume work edited by Jacob De Haas 'in collaboration with more than one hundred and fifty scholars,' is available at Internet Archive (https://archive.org/stream/encyclopediaofje00unse/encyclopediaofje00unse_djvu.txt). But Jewish Quarterly Review devastatingly critiqued it for its numerous inaccuracies in a three-page review in 1937: https://www.jstor.org/stable/1452466enter link description here.