Org-mode is an Emacs Mode for Notes, Planning, and Authoring. Developed by Carsten Dominik
License: Open Source
2Do offers a user-friendly interface and is great for cross-platform task management, making it suitable for casual users. On the other hand, Org-mode, while more complex, provides powerful customization and integration options for users familiar with Emacs, making it ideal for those who need a highly organized and text-based task management system.