Avotaynu
Avotaynu is the leading publisher of information and products of interest to persons who are researching Jewish genealogy (Jewish roots) and Jewish family history. This includes the journal "Avotaynu", books, and microfiche. In addition, Avotaynu offers books, maps and video tapes published by other companies.
http://www.avotaynu.com/

Dictionary of Jewish Surnames in Russian Empire
This is a scholarly work which will help researchers identify the history and etymology of Jewish surnames. The area includes the Ukraine, Belorussia, Bessarabia, Lithuania, and Russia. ...[More]
http://www.ancestry.com?db=3173

FEEFHS
FEEFHS (Federation of East European Family History Societies) is an "umbrella" organization of over 170 genealogy-related organizations that specialize in some part of Eastern Europe. Several databases can be found here and the entire web site can be searched for any word using the "WebPortal Index" search feature.
http://feefhs.org

FEEFHS's Lithuania Research List
This list can be used to connect with other Lithuanian genealogy researchers.
http://feefhs.org/baltic/lt/ltrl.html

How to Find Relatives in Lithuania
List of links to various web sites that may help in your search. Presented by Teisines Informacijos Centras in English and Lithuanian.
http://www.tm.lt/Litlex/Liten/Frames/genealog.htm

JewishGen ShtetlSeeker
Search for towns in Lithuania and Poland. Presented by JewishGen.
http://www.jewishgen.org/ShtetlSeeker/loctown.htm

Lithuania Genealogy Forum
Message board for Lithuanian genealogy researchers. Sponsored by Genealogy.com.
http://genforum.genealogy.com/lithuania