Simple and intuitive card system : 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. Trello’s notification system: You’ll get notifications wherever you are: inside the app, via email, desktop notifications via the browser, or via mobile push notifications. Notifications stay in sync across all your devices. Checklists and due dates: tasks, upcoming dates, or items. And with the Calendar Power-Up, everything is in a nice calendar view inside Trello. Or use the iCal feed in your own calendar app. Works on every platform : Apps for iPhone, iPad, Android phones, tablets, and watches, Kindle Fire Tablets, and Windows 8. Search, filtering, and labels: Powerful search engine,Labels help you finely categorize your cards so you can find and filter. Data is private and secure: All data is sent over a secure, SSL/HTTPS connection, the same encryption technology used by banks.

Channels Your workspace is comprised of channels: a single place for messaging, tools, and files. Channels bring the right people together with all the right information. Direct messages Direct messages (DMs) and group direct messages (group DMs) are best for ad-hoc conversations that don't require an entire channel to weigh in. Notifications Notifications are Slack’s way of telling you about items that need your attention. You can choose to receive notifications on your desktop, your mobile device, or by email. Mentions Mentions and user groups are an easy way to notify team members and get the right eyes on important information.