Ancestry.Com
Available by subscription or for free when accessed from many libraries. It contains every-name index of every available US census from 1790 to 1940, as well as extensive passenger lists and many local records. For Jewish records, see Jewish Family History Collection

Boston Jewish Advocate Databases:
Obituary Database
Wedding Announcements Database

Church of Latter Day Saints (Mormons) Archives
An online catalog of the world’s largest collection of genealogical records. Family History Library catalogue lists all microfilms that can be ordered and viewed at a local Family History Center (e.g., Weston). Films contain birth, marriage, and death records of U.S. and European communities, ship records, records of organizations helping immigrants, etc. For lists of holdings of Jewish records only, see: www.JewishGen.org/databases/FHLC/

Italian Genealogical Group 
Contains searchable databases for NYC Naturalizations, Births, Deaths and Marriages. Includes Links for ordering documents.

JewishGen – The largest and most comprehensive website for Jewish genealogy – research information, tools, and extensive databases.

MA Death Index (1841-1910)
This index covers the years 1841 through 1910 for deaths that occurred in Massachusetts. Additional indexes are available at the Archives for the years 1911-1915. The birth indexes for 1841-1910 should be up shortly.

New York City Vital Records
The Municipal Archives has records of births reported in the five Boroughs of New York City (Manhattan, Brooklyn, Bronx, Queens and Staten Island), prior to 1910; deaths reported prior to 1949, and marriages reported prior to 1930.