TEDEd

TED Talks for el-hi subjects. An interesting addition to the Khan Academy. Each clip comes with a comprehension quiz and suggested discussion topics, making them ideal for listening and speaking exercises.

Cueprompter

 An online free teleprompter. Ideal for student presentations, or for reading or pronunciation practice.

Cueprompter

How to use it.

Yappr

The most fun you ever had learning English--with film clips.

Tonuna

Begora! Here we have a competitor for "Ask 500 People." The difference is that it is very UK-centric, not international.

Veewow

This site lets you compile playlists of YouTube videos. You can keep all your ducks in a row here for listening or speaking practice.

DimDim

Odd title--that I grant. But DimDim offers free, open source multimedia videoconferencing with live voice and video: in other words, a live classroom for anyone on the web.

Bricks and mortar? We don't need no stinkin' bricks and mortar!

Filminute

THis is the site for the international one-minute film festival. For our purposes, it is a great source of videos for listening practice, and for discussion topics, all free. Heck, your class might even want to enter as a class project.

6Rounds

Here's what looks to be the ultimate chat site on the web currently: live videoconferencing melded with the social network concept. Obvious possibilities for conversation practice. So far it looks like audio is not part of the package, but it seems to be planned for the future.

Openlifegrid

Here's a new Web 2.0 site where you can actually build your own world. Possibilities for simulating real-life situations--and conversations--are infinite.