This is by no means a comprehensive list for every genealogist, but it is a fairly complete list of the resources I use. Most of them are 100% free.
General/United States Resources
Ancestry.com ($)
Footnote.com ($)
United Kingdom Resources  
Georgia
Includes indexed images of death certificates between 1919-1927 and non-indexed images from 1928-1930, marriage records from the 19th century to the 20th, and much, much more. More states ought to follow Georgia's example.
Indiana 
North Carolina
North Carolina
Ohio
"This database was produced from a microfilmed copy of an  alphabetical  card file containing local cemetery records and newspaper death notices  gathered by the staff of the Cleveland Public Library.  A small  collection  of records from the Cleveland Bureau of Vital Statistics and some  indexed  items from the Annals of Cleveland were also part of the original  card file  and are also included in the database. The newspaper source material  consists  of paid notices which were published in the following newspapers: Cleveland   Plain Dealer, 1850-1975, the Cleveland Herald, 1833,  1847-1848, 1876,  1878-1879 and the Cleveland Press, August 16, 1941 - 1975."
Search marriage records from 1810-1998 and order up to 40 copies for free.
Images of death certificates from 1908 to 1953.
Pennsylvania 
South Carolina
South Carolina
Virginia
 
 
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