Organize Anything, Together. An intuitive and collaborative, adaptable free web-based project management application made by Fog Creek Software. Projects are represented by boards, which contain lists, which contain cards. Cards are supposed to progress from one list to the next (via drag-and-drop), for instance mirroring the flow of a feature from idea to implementation. Users can be assigned to cards. Users and boards can be grouped into organizations. Cards accept comments, attachments, votes, due dates, and checklists. Supported on iPhone and iPad, Android, and Windows 8/RT.