Todoist
Freemium
Todoist: To-Do list and Task Manager.
Task Coach
Open Source
A simple and friendly task manager written in Python.
TickTick
Freemium
TickTickis a cross-platform to-do list app & task manager helps you to get all things done and make life well organized.
Org-mode
Open Source
Org-mode is an Emacs Mode for Notes, Planning, and Authoring.
2Do
Commercial
2Do lets you take a completely different approach to managing your tasks. With its extremely simple-to-use interface.
GTDNext
Freemium
GTDNext is a task management app available online and works in Chrome, IE and Firefox.
Moo.do
Freemium
Moo.do brings all of your tasks together into one consistent interface.
Things
Commercial
Things is a delightful and easy to use task manager.
Doit.im
Freemium
Doit.im is a Cross-platform Best Online GTD Service, which can sync with Phones.
fluxday
Open Source
fluxday is a user-friendly, free & opensource task & productivity management tool for growing startups.
Todo.txt
Open Source
todo.txt is software and operating system agnostic; it's searchable, portable, lightweight and easily Todo management software.
Taskwarrior
Open Source
Taskwarrior is an open-source, cross platform time and task management tool. It has a command-line interface rather than a graphical user interface.
Tasque
Open Source
Tasque is an open source task management application.
Conqu
Freemium
Conqu is a simple yet powerful task management tool designed to help you conquer your inbox and get things done.
