On the World Wide Web there are many unrelated data sources, application programming interfaces and services. Nowadays it is possible to link them with the help of different tools to a unified mashup application. Their appearance coincides with the start of the second generation of the web called Web 2.0. In this thesis tools for quick development of data-oriented applications are put in different categories according to their mutual properties and differences. Selected representatives are later on explored and assessed in a multi-attribute decision model according to their user experience, user support and functionalities. Based on results of the model a mashup is developed in the Yahoo Pipes and the Google Spreadsheets tool. With this mashup, the user is able to see additional information about the selected country including map, videos and news feed.
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