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
SocialEngine - Socialengine PHP: Elevating Your Online Community Experience.
Vocaroo - Vocaroo is a quick and easy way to share voice messages over the interwebs.
mooSocial - mooSocial is the best social network script to create a niche community or social site.
statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.
JomSocial - Open Source Social Networking Software. Award winning open source community software by JomSocial. This social networking software is widely used by many Joomla users.