General Interest
Cemeteries and Cemetery Records
Cemetery records from many countries. Some extensive, some limited.
Family History Index
Are your ancestors listed in the Family History Index?
Family Search
Free on-line access to the largest genealogical database. Previously known as the International Genealogical Index
One Great Family
Fee-based service which includes research already done for some family trees
Rootsweb
Claims to be the oldest and largest free genealogical site.