Supermemo
SuperMemo is a program that makes learning pleasurable and easy. The methods it pioneered will not only enable you to remember the things you learn forever, but also to gain knowledge at an unprecedented rate.
Pages about SuperMemo
Pros_and_cons_of_a_single_supermemo_collection
SuperMemopedia
SuperMemopedia is the free resource about SuperMemo.
How to Ask a question in SuperMemopedia
How to Answer someone else's question in SuperMemopedia