CloudTalk - Work locally, grow globally
Telbee.io - telbee adds voice messaging to podcasts, websites, social media and email to easily hear from and build human relationships with your customers and community - save time, reduce frustration, and gain sales, understanding and fans
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Vocaroo - Vocaroo is a quick and easy way to share voice messages over the interwebs.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs
statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.