Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
A Trello board is a list of lists, filled with cards, used by you and your team. It’s a lot more than that, though. Trello has everything you need to organize projects of any size. Open a card and you can add comments, upload file attachments, create checklists, add labels and due dates, and more. You can invite as many people to your board as you need, all for free. Drag and drop people to cards to divvy up tasks. Everyone sees the same board and the whole picture all at once. Start a discussion with comments and attachments. Add a quick note or a detailed, Markdown-enabled diatribe. Mention a member in a comment to make sure they get notified. Add files by uploading them from your computer, Google Drive, Dropbox, Box, and OneDrive. Liven it up with emojis, too. With checklists and due dates, you won’t miss important task