JewishGen – The largest and most comprehensive website for Jewish genealogy – research information, tools, and extensive databases. One must register to access some sites, but there is no fee. Below are only a few of the offerings:

Ancestry ($$, but many libraries offer free library additions)
Comprehensive source for U.S. and foreign materials.  Free at many libraries.  Paid subscription needed. for home use after free trial period

My Heritage ($$, but many libraries offer free library additions)
International genealogy research website and social network service. Available by paid subscription.

Family Search (Mormon Library)
World’s largest collection of genealogical records available on microfilm and online.

Steve Morse One Step
Find your ancestors more effectively in the Ellis Island database and the U.S. and N.Y. census. A wealth of other genealogical material.

Deb Lerner’s charts for census, naturalization, immigration, and military records.

Family Tree Templates – 5 generation chart, family group sheet