The main purpose of this call for tender called 'Territorial Impact Assessment (TIA) Web application' is to conclude a service contract that shall support the scientific platform and tools, foreseen in the framework of the ESPON 2013 Programme. This call for tender, therefore, aims at selecting a service provider able to develop a practical and user-friendly web application based on the 'TIA quick check' developed by the ESPON ARTS project (Assessment of Regional and Territorial Sensitivity) allowing regional policy makers and practitioners to identify potential territorial impacts of new EU Legislations, Policies and Directives.