Anki
Open Source
Anki is a spaced repetition flashcard program. Anki is the Japanese word for memorization.
Mnemosyne
Open Source
Mnemosyne is a free flash-card tool which optimizes your learning process.
AnkiApp
Commercial
AnkiApp is a flashcard app for iOS (iPhone + iPad), MacOS, and Android.
Learning with Texts
Open Source
Learning with Texts (LWT) is a tool for Language Learning, inspired by Stephen Krashen's principles in Second Language Acquisition.
Compare SuperMemo with alternatives
Compare Mnemosyne and SuperMemo and decide which is most suitable for you.
Compare Learning with Texts and SuperMemo and decide which is most suitable for you.