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

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

PushPulse - Critical notification management and employee communication solution.

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

XComms - XComms provides desktop alert software tools that allow send out desktop alerts through various flexible messaging channels, reach all employees directly with full desktop targeting, scheduling and real time acknowledgement reporting.

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