Skype for two weeks running has been giving us tremendous issues preventing a lesson from happening twice. After giving up this past time, anjanasuta suggested http://www.highspeedconferencing.com/index.htm
add1sun sugggested this:
* http://www.gizmoproject.com/
It would be great if we could get some more options and battle test these things before we try another lesson. Thanks!
Another SIP software (open source):
* http://www.wengophone.com/
I found out that WengoPhone is of no use because it supports conferences with 3 participants only.
There is also Talk Shoe. Among the ways you can connect to participate are Skype, Gizmo, and Dialup.
* http://www.talkshoe.com/