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Effitask is a graphical interface for the todo.txt approach for handling to-do lists. It's free, open source and written for Linux.

jdotxt is an open source, cross-platform Desktop tool for managing your todo list. It’s geared towards Gina Trapani’s todo.txt file format and stores all of your stuff in two human readable text files.

A free, simple todo list program for Windows. Fast as Notepad, supports subtasks, custom task orders and more. Works as a basic mind mapper as well.

GTaskBox is free to do list application with features such as team management, to do list with reminder, assign tasks to anyone in your contact list.

Share ideas with friends.

EasyBusy is a productivity app that will help you keep all your tasks and ideas in one place, complete them on time and never forget anything, all that will fun and no stress!.

Manage Your To-Do lists, Get things done.

Task manager implementing Getting Things Done methodology. The workflow and directory structure are designed to be as close as it is possible to GDT system. Includes powerful filter, projects, contexts, tags, flags: "Important", "Urgent", "Starred".

View and edit your org mode tasks while on the go.

It's a powerful and fun way to get organized! With the all-new myDay app you can manage your tasks and calendars in one place. Within minutes, you have access to all your tasks organized in lists and easily see when those tasks are due in your calendar.

This App is a Todo List with a Timer. If the timer goes to zero, one of your tasks will disappear (die). So, to prevent that, you need to complete all the tasks before time runs out. Every time you complete a job, you add more time to the timer. Okay?