ICT4S is a series of research conferences bringing together leading researchers, developers and government and industry representatives interested in using Information and Communication Technologies (ICT) as a tool to reach sustainability goals. The 1st ICT4S Conference was held in Zürich and attracted 250 participants from 40 countries. The theme of ICT4S 2014 is “ICT and transformational change”. Sustainable development needs transformational changes regarding both technology and patterns of production and consumption. This conference explores and shapes the role of ICT in this process and assess positive and negative impacts of ICT on sustainability. ICT for sustainability is about utilizing the transformational power of ICT for making our world more sustainable: saving energy and material resources by creating more value from less physical input, increasing quality of life for ever more people without compromising future generations’ ability to meet their needs.