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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.

Moon Virtual Cards - Purchase Moon Visa® Prepaid Cards with crypto. Pay at millions of online merchants with secure virtual cards.

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

ABcard - ABcard - service allows you to issue an unlimited number of cards to pay for advertising accounts. 3 unique BINs for any work tasks, management of a team of media buyers inside a personal account and complete anonymity when paying for traffic.

Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.