I saw this recently on FamilySearch – Three of my Favorite Genealogical Finding Aids: https://media.familysearch.org/three-of-my-favorite-genealogical-finding-aids/. Gena‘s information below is from the earlier article, but she wrote both articles.
It links to another article posted by – https://news.legacyfamilytree.com/legacy_news/2019/04/three-of-my-favorite-genealogy-finding-aids.html.
In addition to Cyndi’s List and Linkpendium , the aids are The Ancestor Hunt – http://www.theancestorhunt.com/newspaper-research-links.html, FamilySearch Research Wiki – https://www.familysearch.org/wiki/en/Main_Page, and Google Scholar – https://scholar.google.com/. There’s a lot more information on the links in the first paragraph above.