Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.

Anki - Anki is a program which makes remembering things easy. Because it's a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn.

IT Flashcards - Flashcards and quizzes for developers and IT professionals, featuring key recruitment questions to ace job interviews or broaden your knowledge.

Kids Flashcards - Kids Flashcards offers free printable flashcards for kids, parents, and ESL teachers of preschool, kindergarten, primary and secondary education. 1300+ picture card are available for learning English, French, Spanish, German, Chinese and other langs.

QuillBot - Quillbot is a free paraphrasing tool that will rewrite any sentence or paraphraph you give it. The article rewriter can rewrite essays or articles and is excellent as a grammar and fluency corrector.

Flashcards by BritishCouncil - Flashcards is one of the best learning apps that allows you to manage your studies and keep the record of how much course content you have covered and how much left.