I like Memrise, but I don't know if it's disruptive as much as it is convenient. It does similar things to Rosetta Stone and Pimsleur (though I think it's more effective). Spaced repetition, pronunciation, quizzes, diverse methods of testing your understanding. It's gamified with leaderboards and points.

I don't work there, I just use it, but I think it's great for non-tonal languages (as in, it doesn't do Mandarin great).