Do - Do helps you run productive meetings. Do work you love.
Things - Things is an easy to use task manager.
Tasks - The new task app from the team that brought us Wunderlist, Microsoft To-Do is a great way to manage tasks. List everything you need to do—or import tasks from Outlook, Todoist, and Wunderlist so you don't have to start over.
Winterboard - Give your iPhone or iPod Touch a graphical overhaul!
TaskPaper - Plain text to-do lists for Mac
Logtime - Diary, tasks and goals. All-in-one productivity solution.