There have been times I’ve found pages were missing from the FamilySearch online records but they were here. Sometimes there are more records available at FamilySearch. Sometimes Antenati has records FamilySearch doesn’t.
Just because it is on the internet, doesn't mean it is free. We're all guilty of copying stuff, but before you republish, check to see if it is in the public domain or get permission to use it.
The Library of Congress is a treasure trove of sources.
Digitized books that are no longer copyright protected where you can use the search button to look for names or locations in the text.
Prints and Photographs that are not copyright protected.
Over 175,000 photos documenting life across the United States between 1935 and 1944. Remember, anything produced by the Federal Government is in the public domain.
Panoramic/Birds-Eye View Maps which are downloadable.
Historic Newspapers
Slave Narratives
Oral History Interviews

Acerra is where my husband's paternal grandfather's family is from so I do a lot of research in this area. I ended up tracing all the Esposito families because I was finding errors on FamilySearch and Ancestry. The name Esposito was given to almost all foundlings in the Naples area until Napoleon put a stop to it, so there are a lot of unconnected Esposito families.
Click the Button for a good explanation about foundlings.

”The International Society of Genetic Genealogy (ISOGG) was founded in 2005 by DNA project administrators who shared a common vision: the promotion and education of genetic genealogy. Our mission is to advocate for and educate about the use of genetics as a tool for genealogical research, and to promote a supportive network for genetic genealogists.”
In order to find records in the city of Naples, Italy, you need to know which neighborhood your relative lived in. Go to this wiki page to refer to the list of 30 neighborhoods.