The Internet Archive has been around since 1996, and has a magnificent assortment of genealogical materials in many different categories of interest to genealogy researchers. It is a major resource; not to be missed.
I refer to it several times a week, and it is a major resource for all the links that The Ancestor Hunt curates and includes in its free online link collections for multiple genealogical categoreies.
To obtain the one-page QuickSheet pdf for easy reference of what genealogical materials are available at the Internet Archive, you can download it for free by clicking on the Download button:
For all the previously published Quick Reference Guides, click on QuickSheets.
Good Luck and Happy Hunting!