TrentoRISE. http://www.trentorise.eu/. [3] Balsamiq Mockups. http://www.balsamiq.com/products/mockups. [4] Pixton. http://www.pixton.com. [5] Go!Animate. http://goanimate.com/. [6] H. Sharp, Y. Rogers, J. Preece, “Interaction Design: Beyond Human-Computer Interaction”, 2^ edizione, John Wiley & Sons, 2007. [7] T. Schlatter, D. Levinson, “Visual Usability: Principles and Practices for Designing Digital Applications”, 1^ edizione, Morgan Kaufmann, 2013. [8] K. Mullet, D. Sano, “Designing Visual Interfaces: Communication Oriented Techniques”, 1^ edizione, Prentice Hall, 1994. [9] SIGCHI. http://www.sigchi.org/. [10] ACM. http://www.acm.org/. [11] A. Grimes, R. Harper, “Celebratory Technology: New Directions for Food Research in HCI”, in Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, CHI ‘08, pagg. 467-476, New York, NY, USA, 2008. ACM. [12] J. Xu, P. Chen, S. Uglow, A. Scott, E. Montague, “Design Challenges and Guidelines for Persuasive Technologies that Facilitate Healthy Lifestyles”, in International Journal of Computer Technology and Application 3, pagg. 140-147, 2012. [13] C. Linehan, T. Leeman, C. Borrowdale, S. Lawson, “Crowd saucing: social technology for encouraging healthier eating”, in Interactions (volume 20, issue 1, January + February 2013), pagg. 53-57, New York, NY, USA, 2013. ACM.