"Anki is a program which makes remembering things easy." http://ankisrs.net/
Unfortunately there is no Kindle version yet. Ankimini runs a linux server which could be accessed through the webkit browser.
Open Source code can be found on https://github.com/dae/ankimini
I have only found an installation instruction for android:
(or WM6: https://github.com/mmehnert/ankimini...ndows-mobile-6
Would be amazing, if someone could manage to port this to a jailbroken kindle linux!