Used by educators all over the world, Voxopop is a tool that enables you to create online recorded discussions which you can set up easily and which your learners can access easily and use in ways to really maximise spoken English practice. It is a free online discussion site.

The site allows to create called "talk groups", communities of real people discussing various topics using their real voices. Anyone can create a talkg roup, These talk-groups can be public, restricted or entirely private, which is ideal for classrooms. Anyone can explore and listen to public discussions, but only signed up users can start or join talk groups, or join in on discussions. You'll also get access to other features, like being able to add discussions to a watch list, and being notified by when others contribute.

http://www.voxopop.com/