Call-Em-All VS EssentialPIM

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.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

InformaCast - InformaCast is a leading mass notification software solution that helps organizations reach everyone with critical information.

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.

SnapComms - SnapComms, An Everbridge company, provides internal communication solutions for organizations.

Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.