Smart cities are high on the political agenda around the globe. However, planning smart cities and deploying applications dealing with the complex problems of the urban environment is a very challenging task that is difficult to be undertaken solely by the cities. We argue that the uptake of smart city strategies is facilitated, first, through the development of smart city application repositor...

The development of complex software and hardware systems has increased in recent years. One reason is the continuous development in information and communication technologies sectors that enable a smooth and seamless connection of single components or systems. Another reason is the changed way of life, e.g. urbanization leads to new challenges in city planning to deal with large crowds, highene...