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Spaced repetition learning system for pairs of words.

Current Version: 0.5

  • Released: Oct 28, 2004
  • Licensed: GPL2


Popup is an interactive learning aid for pairs of words. It behaves much like a stack of flashcards, but handles one-to-many and many-to-one word relationships better, and includes an integrated scheduler for efficient use of your 'cards'.


  • An editor with support for copying and pasting groups of words, as well as drag and drop.
  • Three quiz styles: multiple choice, spelling, and flashcard.
  • Supports quizes and practice
  • Graduated time interval scheduler.
  • Localized for Thai and German.


Bjorn Ghola, Rob Burns

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