verbling is a good idea, moving forward..

I've used Transparent recently and would recommend it. Not free but a lot cheaper than Rosetta Stone at $29 per month. They have a free offering called Byki as well which I haven't tried.

Check out Quizlet - http://quizlet.com

http://noexcuselist.com/everything See the "Languages" section.

I've used duolingo for Spanish review; it's pretty good. Honestly the best thing about it is the UX: you get little bite-sized exercises you can go thru as fast or slow as you want, review, etc., so it's easy to squeeze into a 10-20min/day block. The main weaknesses are a) the examples are arithmetically generated so sometimes you get "My horse only eats milk" or something as an example sentence (it's usually pretty good tho), and b) you don't get a deep grammar review, it's just lots of little examples & practices. The latter point could be seen as a "pro" depending on your learning style.

Try http://www.babbel.com

tsuan: I'm recommending you left, right and center :)

One request please: could you make your login form save the password?

I found that duolingo is actually not that good for advanced students - everything I saw on there seemed to be focused on learning by translating phrases into English. Thats pretty distracting once you get past a certain level.