Trello: management by lists
From shopping to coursework deadlines, web clippings, photos and shared documents, everything you need to remember and share can be managed quickly and easily using Trello. Think of it as a giant set of magnetic boards to which you can pin and move notes in lists about anything you like. You can describe, comment, pin documents, images and video clips, share lists and boards with others and use them to collaborate on projects all for free. Available online or to download.