MyBrocard - Brocard allows you to create an unlimited number of virtual cards for paying for advertising and other online payments, manage a team of buyers, choose from 20+ bins for various tasks, and enjoy convenient API for integrations.

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.

Coinramp - The Coinramp Card lets you ‍spend over 10+ cryptocurrencies like cash, online, in-stores and ATM withdrawals. Available in 100+ countries, no ID needed. Anonymous Crypto Cards

PrepFlash - Automatic flashcard generator

PST.NET - Virtual payment cards for online shopping and advertising

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