Tasks is libre open-source software, based on the original source code from the popular Astrid Tasks & To Do List! Tasks is easy-to-use, feature-packed, flexible and customizable, and synchronizes with a variety of services.




The best open source alternative to Astrid is Tasks.org. If that doesn't suit you, our users have ranked more than 100 alternatives to Astrid and 17 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Astrid are Habitica, ToDoList, Org mode and Taskwarrior.
Tasks is libre open-source software, based on the original source code from the popular Astrid Tasks & To Do List! Tasks is easy-to-use, feature-packed, flexible and customizable, and synchronizes with a variety of services.




Habitica is a free habit building and productivity app that treats your real life like a game. With in-game rewards and punishments to motivate you and a strong social network to inspire you, Habitica can help you achieve your goals to become healthy, hard-working, and happy.




Organize projects with deeply nested tasks, multi-language support, and flexible XML storage. Streamline scheduling, customize printing with stylesheets, and collaborate efficiently on multiple projects, including IT and general GTD use, on Windows or Linux via WINE.




Org mode is for keeping notes, maintaining TODO lists, planning projects, and authoring documents with a fast and effective plain-text system.




Taskwarrior is an ambitious project bringing sophisticated capabilities to a simple and elegant productivity tool. You'll find it has customizable reports, charts, GTD features, Lua extensions, device synching and more, all while our international team provides excellent...




Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists. It is designed for composite tasks, and also offers effort tracking, categories, notes and more.




Track your tasks and projects in a plain text file, todo.txt. A todo.txt is software and operating system agnostic; it's searchable, portable, lightweight and easily manipulated.

Notational Velocity is a mouseless application for storing and retrieving notes.



An easy to use and lightweight To-Do App. Manage your tasks in lists; Simple, but powerful User Interface; Tablet-UI; Nice little widget; Sort your tasks in different ways; Fully configurable Notifications & Reminders; Easy Backup and Import; Import your tasks from Astrid;...
Tasque is a simple task management app (TODO list). The main window has the ability to complete a task, change the priority, change the name, and change the due date without additional property dialogs.




ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program.




A checklist application written in java with reminders and system tray support to improve productivity.

It's a successful and actively developed fork of Astrid