Remember The Milk
Freemium
Remember the Milk (RTM) is an application service provider for a Web-based task- and time-management.
Toodledo
Freemium
Toodledo is a popular and powerful online productivity tool. Manage your to-do list, take notes, track habits, and organize ideas into outlines and lists.
Task Coach
Open Source
A simple and friendly task manager written in Python.
Doit.im
Freemium
Doit.im is a Cross-platform Best Online GTD Service, which can sync with Phones.
MyLifeOrganized
Freemium
MyLifeOrganized (MLO) is the most flexible and powerful task management software for getting your to-dos finally done.
TickTick
Freemium
TickTickis a cross-platform to-do list app & task manager helps you to get all things done and make life well organized.
Nirvana
Freemium
Nirvana is a cloud-based task manager that isn’t just about doing more.
Todo.txt
Open Source
todo.txt is software and operating system agnostic; it's searchable, portable, lightweight and easily Todo management software.
Conqu
Freemium
Conqu is a simple yet powerful task management tool designed to help you conquer your inbox and get things done.
Clear
Commercial
Clear is a tasks, reminders and To-Do lists app.
Todoist
Freemium
Todoist: To-Do list and Task Manager.
Things
Commercial
Things is a delightful and easy to use task manager.
OmniFocus
Commercial
OmniFocus is a personal task manager.
Habitica
Open Source
Habitica (HabitRPG) is an online task management application.
Quire
Free
Quire is a collaborative task management tool for breaking down goals in hierarchical lists.
Any.do
Freemium
Any.do is a life management and productivity app.
Org-mode
Open Source
Org-mode is an Emacs Mode for Notes, Planning, and Authoring.
Awesome Note
Commercial
Awesome notes is a powerful text and voice note taking application with many great features.
Nozbe
Commercial
Nozbe is a to-do, task, project and time management application.
Compare 2Do with alternatives
Compare Remember The Milk and 2Do and decide which is most suitable for you.
Compare MyLifeOrganized and 2Do and decide which is most suitable for you.