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.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
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.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
InformaCast - InformaCast is a leading mass notification software solution that helps organizations reach everyone with critical information.
iTerm2 - A terminal emulator for macOS that does amazing things.