Wrike

Freemium

Wrike is an online project management software that gives you full visibility and control over tasks.

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.

Org-mode

Open Source

Org-mode is an Emacs Mode for Notes, Planning, and Authoring.

Avaza

Freemium

Avaza is a beautiful online software suite with modules for Project Management, Timesheets, Expenses & Invoicing. Access from anywhere, with any device.

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.

Nitro

Open Source

Nitro is free open source task management software.

Quiver

Commercial

Quiver 3D Augmented Reality coloring apps: print, color and see your drawing in beautifully hand-animated 3D worlds.

Conqu

Freemium

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

Todoist

Freemium

Todoist: To-Do list and Task Manager.

OmniFocus

Commercial

OmniFocus is a personal task manager.

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.

2Do

Commercial

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

TaskPaper

Commercial

TaskPaper is a plain text to-do list that's surprisingly adept.

Tasque

Open Source

Tasque is an open source task management application.

Priority Matrix

Commercial

Priority Matrix is a time management software application that is supported on a number of platforms, including Microsoft Windows, Mac OS X, Android, and iOS.…