Top 4 Open-Source Alternatives to FlashAcademy

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.

Flashcards: for coders and scientists. Open-source, free for all.

Open source app for learning foreign words

A Byte of Python is a Python programming tutorial and learning book that teaches you how to program with the Python programming language.