Knowt is a free tool that I’ve written about a few time in the last couple of years. It’s a tool that you can use to create flashcards from scratch or by importing a document and letting Knowt automatically generate flashcards for you. Additionally, Knowt has a large database of flashcards that you can browse through and add into your own account.
https://www.freetech4teachers.com/2022/09/a-great-alternative-to-quizlet.html