Trello is a star when it comes to project management software and collaboration tools. It embodies a neat interface with cards stacked up for different projects. Each card can be opened to view more detail such as checklists, labels and due dates.
While it is favored by the likes of National Geographic, Google, and more, it comes without some basic features that might be critical for most teams. Trello works great as a simple to-do list app, however, it's limited when it comes to handling bigger and complex projects.