TelCentris
VoxOx Call
FreeCall, text, fax, and receive voicemail from your iPhone for lower price.
iOSVoxOx
FreeUnify your Google, Skype, Yahoo, MSN, AIM, Jabber, Facebook, SMS, & phone.
WindowsCloud Phone - Mobile Business Phone System
FreeThe Cloud Phone mobile app is a business phone system in your pocket with unique and innovative features. Now you can use one device to manage your...
iOSVoxOx
FreeGoogle, Skype, Yahoo, MSN, AIM, Jabber, Facebook, SMS, Fax, and Phone under a single interface.
Mac