I have 2 Ubuntu PCs (Not in the same physical place) and I want to call from my PC to the other. What apps does Ubuntu have for making phone calls from PC-to-PC.
UPDATED - Forgot to mention that it should not be Skype or Google Talk. In the case of Skype because we are actually looking for an alternative to it to call one another. For the Google Talk plugin because the need to have a web browser opened to use it is not what we need.