Trello is a free app that makes working on group projects as easy as using sticky notes on a whiteboard. Available on phone, tablet, and desktop, Trello’s drag-and-drop interface and visual way of organizing the tasks to make sure its user always knows what needs to get done and who’s working on it. Whether it’s the sales pipeline,new employee training program, a home renovation project, or even a wedding, Trello is flexible enough to make sure they’re on top of all the important projects.