Martin Burrett of ICT Magic says:
"An amazing language learning site which helps learners of MFL remember words for over 200 languages by associating them with visual clues/mnemonics and score points by showing you remember the language in a variety of ways. You can listen to audio of the words you are learning. The site tracks your progress and analyses where you need improvement and it will adjust the words you are shown accordingly."
A very nicely designed site which allows you to hear words, read definitions, and test yourself as you go. Lots of languages, including EFL. In terms of acquisition, what's missing is context, but it looks like teachers can create their own courses, so contextual cues and sample sentences could be supplied that way.