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
Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...
Vocaroo - Vocaroo is a quick and easy way to share voice messages over the interwebs.
TextMe - TextMe is a free calls and messaging application at both local and international levels.
statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.
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.