Tandem
Learning a language using the option of a tandem offers a simple and amazing way of communicating with people in other languages. You can meet interesting people and at the same time improve your language skills and help each other with a second language. It's free and lots of fun! 
eTandem [Ruhr-University Bochum Germany] 
Internet-Tandem [Ruhr-University Bochum Germany] Internet-Tandem: Definitions, principles, advantages
[Ruhr-University Bochum Germany] Internet-Tandem: Ideas for Teachers
[Ruhr-University Bochum Germany] Free Internet German Course [Deutsch-Lernen.com] Tandem City
