Have you tried Mnemosyne? http://mnemosyne-proj.org/ http://mnemosyne-proj.org/ It may not have as many features as Anki, but it has a good plugin architectur

Have you tried Mnemosyne? http://mnemosyne-proj.org/ http://mnemosyne-proj.org/ It may not have as many features as Anki, but it has a good plugin architecture and the UI is very simple.