I just added Studly to Launchpad.net.
Studly is a simple flashcard trainer using the Leitner “spaced repetition” model.
It supports unlimited card groups, fullscreen study mode, studying your cards forwards or backwards, study statistics, and CSV import and export of cards.
The README has package dependency info for Ubuntu. Please leave comments if you can provide install instructions for other distros.
I set up the project for translations, so if you’d like to help out check out: