Communifire - Enterprise Social Collaboration Software
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
Bonzai Intranet - Bonzai is an intranet platform with flexible pre-built features for SharePoint and Office 365.
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
hub - The Hub is a versatile intranet portal and collaboration solution that boosts employee engagement and productivity in a digital workplace.
Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.