TextNow - TextNow is a mobile virtual network operator (MVNO) that provides a free phone service to users by using other cellular networks coverage.
UserVoice - UserVoice integrates easy-to-use feedback, helpdesk, and knowledge base management tools in one platform that empowers users to speak and companies to understand.
TextMe - TextMe is a free calls and messaging application at both local and international levels.
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
Talk360 - Talk360 is a best-in-class communication utility that offers a convenient way to connect with loved ones globally.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.