Netherlands Society for Jewish Genealogy 
Shows you quite a large number of sources and documents and enable you to use the Internet as a tool in your genealogical research in the Netherlands and in the border territories which could be of interest when looking for your Dutch ancestors.
http://www.nljewgen.org/Ozarow Cemetery Restoration Project
The Ozarow cemetery, one of the few remaining Jewish cemeteries in Poland, dates back almost 400 years. Dedicated to the effort of restoring the cemetery walls, erecting a commemorative monument, and repairing and raising toppled stones.
http://www.ozarow.org/intro_eng.shtml
Jewish Genealogical Society of Maryland
Jewish genealogy in Maryland and nearby areas.
http://www.jewishgen.org/jgs-maryland/
JHS of Greater New Haven
The Jewish Historical Society of Greater New Haven, Inc.
http://pages.cthome.net/hirsch/index.html
Jewish Genealogical Society of Greater Boston
Non-profit organization which develops and promotes the growth, study, and exchange of ideas among people interested in Jewish genealogical research and family history. Formed in 1981 as a study group for people looking into their family history. Over 300 members.
http://home.comcast.net/~jgsgb/
