tdo is a Chrome add-on developed by Marko Stijak. It is a keyboard-driven, hackable TODO list that offers a flexible and efficient way to manage tasks. With tdo, users can easily create and organize their to-do lists, making it a valuable tool for productivity.

One of the standout features of tdo is its support for Markdown. Users can format their tasks using Markdown syntax, allowing for easy formatting and organization. Additionally, tdo offers keyboard navigation, making it quick and easy to navigate through tasks and lists.

tdo also utilizes hashtags for categories, priorities, and more. By using hashtags, users can easily categorize and prioritize their tasks, making it simple to filter and find specific items. Furthermore, tdo automatically removes completed tasks after a specified period of time, keeping lists clean and clutter-free.

Another notable feature of tdo is its CSS hackability. Users have the ability to write functions to assign custom CSS styles and classes to tasks and lists. This allows for a personalized and visually appealing task management experience.

In addition, tdo offers Gist storage, providing users with the option to store their tasks in Gist, a simple and powerful way to share code snippets. This integration allows for seamless syncing and collaboration across devices.

Overall, tdo is a powerful and versatile TODO list add-on for Chrome. With its keyboard-driven interface, Markdown support, hashtag usage, and CSS hackability, tdo offers a comprehensive solution for efficient task management.