Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Nozbe is a web-based task manager and to-do list software that will help your personal productivity - project management and time tracking. Nozbe's gtd software is available in your web browser and on your mobile phone and Apple iPhone.
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Memorigi is a simple, different, and beautiful Todo list, Task manager, and Reminder application packed with a lot of cool features to help you be and stay organized.
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