Family Tree Legends Website
Many people have probably heard of the genealogy software called Family Tree Legends. I haven't used it myself, but if you look at their website you can read about all their features.
What you may not know is that their website contains more than just genealogy software. I recently have been using their site to access a free index to many vital records. So far I've searched Illinois marriages and Missouri Births and have found some good information. Here is a list of just their Birth, Marriage, & Death Records: (I've been able to access some of the ones that aren't marked as free - so they may all be free)
Arizona Births, 1887-1928
Arizona Deaths, 1878-1953
Boulder County, Colorado Divorces, 1904-1912
California Births, 1905 - 1995 FREE!
California Deaths, 1940 - 1997 FREE!
Colorado 1870 Federal Census
Delaware Naturalizations
Idaho Deaths, 1911-1951
Illinois Deaths, 1916-1950
Illinois Deaths, Before 1916
Illinois Marriages, 1763-1900 FREE!
Indiana Naturalizations
Kentucky Births, 1911 - 199
Kentucky Deaths, 1911 - 1992 FREE!
Kentucky Divorces, 1907 - 1998
Kentucky Marriages, 1960 - 1993
Maine Deaths, 1960-1996
Michigan Deaths, Late 1800's
Missouri Births
Missouri Deaths
New Mexico Deaths, 1899-1940
Oregon Deaths, Early 1900's
Portland, Oregon Deaths
Social Security Death Index FREE!
Tennessee Deaths, 1908-1912
Texas Births, 1926-1995 FREE!
Texas Deaths, 1964-1998 FREE!
Texas Divorces, 1968 - 2002
Texas Marriages FREE
Vermont Deaths, 1989-2001
They also have Military, Land, Court, Probate, Biographies, and History Records as well. I suggest checking it out when you get the chance.