The Foreign Service institute, the school that teaches diplomats languages, has free courses available. These courses were developed with government money and are old enough (before 1989) to be in the public domain. Although dated, these courses include texts (in pdf) and tapes (in mp3), all ported to the Internet by a wonderful non-profit group. Via BoingBoing. The site was mentioned by LifeHacker and so too many people tried to download at the same time. When the servers are available again, you should check it out, or even Czeck it out. (Sorry, couldn’t resist.)