Nice Java word cloud web app... Would be an interesting way to make image links to articles or online courses. You could probably make a nice PowerPoint slide as well. A nice introduction to your presentations...
Another online audio chat site... Does not seem to offer private discussions, so may not be too useful in the classroom. (I have not created an account to confirm this, but there is nothing on the site to suggest privacy settings.)
Both individual and "teacher" exchanges. Very little visible w/out creating an account...
Total number of Individuals looking for a language exchange : 18525
Total number of Teachers looking for a language exchange for a class : 354
Peer learning site for languages, includes video, file upload, and virtual classrooms. Ties into podcasts and seem to partner up with paid langauge learning schools for online tutoring...
Another social language exchange site focusing on setting up one-to-one exchange and social networks.
"italki.com is where you can find everything you need to learn a language. italki is a social network and an online resource for learning foreign languages."
Service for putting language learners together for exchange. Free to join, but also includes paid service where native speakers accumulate points for exhange, while the site collects the cash. Multi-lingual interface.