Doesn't work in Linux But for $1.27 you can use Voipbuster to call a dozen countries for free.
A friend of mine is using it and the quality is usable - similar to skype.
Meanwhile I've been using hitcalls.com Which is very cheap for the amount of calls I do a month and I find POTS->VOIP->POTS has better sound quality.
Update Aug 31 - actually you can get it to run in linux using Kiax a IAX application for KDE.
Posted by Anthony at August 10, 2005 03:25 PM