The Mixxer is a free educational site for language learners hosted by Dickinson College. The Mixxer is designed to connect language learners around the world so that everyone is both student and teacher.
LearnCentral allows educators to use a free public Elluminate room to hold large webinars or group meetings. To qualify, the events must be 1) education-oriented, 2) free (you're not charging those who attend), 3) recordable, and 4) open to anyone to attend.