Mitel - Business Communications and Collaboration
Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...
TextMe - TextMe is a free calls and messaging application at both local and international levels.
XO Hosted PBX - Hosted PBX is a scalable UC solution that uses cloud technology to integrate HD voice & data services, mobility, along with advanced calling
Talkatone - Android App on. Google Play. Stop paying for cell minutes, texts & landlines; Turn your iPad or iPod touch into a phone; Call/Text even in areas with bad cell coverage; Call/Text when travelling without paying for expensive international minutes.
VoIP.ms - VoIP.ms is a VoIP origination and termination tool.