Trello is an online tool created to help individuals and teams get and stay organized. It is essentially a shared virtual bulletin board where users can share ideas, resources, and to-do lists with one another. Individual users can create a "card" dedicated to a particular topic e.g. "Book Club Ideas," "Outreach Plan," "To Do: Monday Event," etc. These cards can then be used to compile Trello boards, which are essentially "lists of lists." Boards and Cards may be shared with others to view or edit. The web version of Trello Basic is free and available for users running Chrome, Firefox, Safari, or Internet Explorer browsers. Users can also download a mobile version of Trello (available for iOS or Android devices) or use it with Slack.