InformaCast - InformaCast is a leading mass notification software solution that helps organizations reach everyone with critical information.
statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.
DialMyCalls - The easy to use mass and emergency notification platform. Send a phone call, text message or e-mail to your entire list of people in seconds.
Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
Call-Em-All - Call or send messages to friends and family members as well as other people who are online. The app allows you to create a message and send it out to multiple devices and pages.
SnapComms - SnapComms, An Everbridge company, provides internal communication solutions for organizations.