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

Checkvist helps you create and share online outlines, project plans, online checklists, and task lists.

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

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

germ lets your team capture every great idea, brainstorm and turn them into actionable project plans.

Goalton.com is a platform for goal and task management.

Any.do is a life management and productivity app.

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

Dynalist lets you organize your ideas and tasks in simple lists.

FCorp My Calendar is a free software to manage a diary, notes, schedules, birthdays, etc.

Gingko lets you shape your ideas with lists, outlines and cards, all in the same clean interface.

Google Tasks is the task list functionality provided by Google.