Rave Alert - Rave Alert is a multi-modal emergency notification system used by state and local governments, colleges, hospitals and universities.
Mudlet - Mudlet is a freshly-minted MUD client, designed to take mudding to a new level.
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.
TinTin++ - TinTin++, aka tt++, is a free MUD client for Mac OS X, Linux, and Windows.
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.
CMUD - Are you tired of the constant grind of the graphical MMO games?