Collanos Phone is a software-only Voice over Internet Protocol (VoIP) phone and a...
Express Talk is software that works like a telephone to let you make calls on your Mac OS...
10.3 / 10.4 / 10.5 / 10.6 / Classic / OS X / 10.7 / 10.8
Go from headset to speaker phone and back, in a SNAP!
Skype is free calls, video calls and instant messages.