2Do lets you take a completely different approach to managing your tasks. With its extremely simple-to-use interface.

Asana is a web and mobile application designed to help teams track their work.

Conqu is a simple yet powerful task management tool designed to help you conquer your inbox and get things done.

EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries, e…

Google Tasks is the task list functionality provided by Google.

GTDNext is a task management app available online and works in Chrome, IE and Firefox.

Any.do is a life management and productivity app.

Clear is a tasks, reminders and To-Do lists app.

Doit.im is a Cross-platform Best Online GTD Service, which can sync with Phones.

fluxday is a user-friendly, free & opensource task & productivity management tool for growing startups.

GTasks is a simple and efficient todo or task management app with Google synchronization.

Kana Reminder is a program which can be used to set a reminder to be triggered at a specified time.