Trello is free web application for project management. A user creates projects presented in the form of boards, which in turn contain lists, i.e. form task lists. Lists contain cards, i.e. tasks. Cards support the following functions the appointment of a project participant, the addition of checklist, setting the date of completion of the project, the attachment file. It is assumed that the cards can be dragged from one list to another. Members and taskbar can be grouped into a single system. The application can be used on iPhone, Android and on the mobile platform Windows Phone 8. However, the website application is available for the most mobile web browsers. The app for iPad was released in 2013.