If you're a fan of Personal Kanban, or you like to use cards or post-it notes arranged in categories to orgaanize your thoughts and your tasks, Trello will appeal to you. we covered it when it launched, too, and even shared a method to shoehorn it into GTD. Trello is fast, flexible, and even fun to use, and in minutes you'll organize all of the components for your projects into columns and cards that are easy to drag around, add supporting details to, comment on, and assign from person to person on your team. You can create different boards for different projects, set due dates or times for each card or set of cards, and more. Trello is even available on iOS and Android, and its drag-and-drop interface (usually) works well on mobile devices.
Trello is free to use, but Trello Gold, the company's premium plan, offers larger file attachments and some visual upgrades like emoji, stickers, and custom backgrounds. More importantly, Gold is a way to support Trello if you love it, but all of the features are available for free. Trello is the project management tool of choice by teams at The Verge, The New York Times, Tumblr, and others, and it doesn't hurt that it's free and simple to get started with.