TextNow - TextNow is a mobile virtual network operator (MVNO) that provides a free phone service to users by using other cellular networks coverage.
Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...
Dingtone - Dingtone is a free call and texting application for making unlimited calls and text messages to any number at the moment registered in any part of the world by any cellular company.
Burner - Disposable phone numbers -- now with MMS photo support
TextMe - TextMe is a free calls and messaging application at both local and international levels.
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies