The use of blockchain technology has the potential to change many core processes in society, industry, education, healthcare, business and government by introducing new ways of transacting that are expected to change the traditional ways in which organizations exchange data and money. Proponents of developing blockchain applications suggest that many benefits can be created by using blockchain, including (enhanced) trust, privacy, transparency and control. As a consequence the traditional role of the middleman in transactions processes might be substituted by blockchain based applications. Although blockchain technology was pioneered in the financial sectors by initiating cryptocurrencies, currently its use is not limited to this sector. Blockchain can be considered as a general purpose technology and as such offers a myriad of options to create blockchain applications. To date, many pilots are conducted and prototypes are developed to better understand its potential, its limitations and its transformative effect on a wide range of application domains.