Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Weekdone - Market leader and innovator since 2013. Set structured quarterly goals, keep track of activities, and focus on getting real business results. Track weekly progress, provide feedback, and move everyone in a unified direction.

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

Quantive - The best platform for turning strategy into results.

EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.

Workboard - Workboard is a performance and productivity app managers use with their teams to share goals, priorities, actions and feedback.