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OmniFocus is a personal task manager.
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.
Todo.txt
Open Source
todo.txt is software and operating system agnostic; it's searchable, portable, lightweight and easily Todo management software.
Nozbe
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Nozbe is a to-do, task, project and time management application.
Simplenote
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Simplenote is an easy way to keep notes, lists, ideas and more.
Toodledo
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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
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A simple and friendly task manager written in Python.
Doit.im
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Doit.im is a Cross-platform Best Online GTD Service, which can sync with Phones.
Quire
Free
Quire is a collaborative task management tool for breaking down goals in hierarchical lists.
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Org-mode is an Emacs Mode for Notes, Planning, and Authoring.
Conqu
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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.
Compare Nirvana with alternatives
Compare Remember The Milk and Nirvana and decide which is most suitable for you.
Compare MyLifeOrganized and Nirvana and decide which is most suitable for you.