Apps to GTD-based

ActiveInbox transforms your Gmail inbox into a powerful task manager, helping you prioritize emails, manage projects, and achieve Inbox Zero with a Getting Things Done (GTD) approach directly within your familiar email environment.

Taskwarrior is a powerful, open-source command-line task management tool designed for serious productivity enthusiasts. It provides a highly configurable and efficient way to track, prioritize, and manage your tasks directly from the terminal, supporting complex workflows like GTD.

Nirvana is a cloud-based task manager built on the principles of Getting Things Done (GTD). It helps individuals and teams organize, prioritize, and manage their tasks and projects with a focus on clarity and mindful productivity, allowing users to focus on what truly matters.

Toodledo is a comprehensive online productivity tool designed for managing complex to-do lists, notes, and outlining. It offers a highly customizable approach to task management, supporting methodologies like GTD, and integrates with various third-party services.