In this demonstration we present Ubi Displays: an open source toolkit designed to simplify and expedite the process of creating media-rich interactive projected displays. Our toolkit enables users of web technologies and commodity hardware to quickly create applications that previously would have taken substantial development effort by skilled programmers. By reducing the required skills, development time, and the costs of tools and hardware we hope to encourage people from a diverse set of communities (e.g. designers and hobbyists) to engage with pervasive displays and explore the different kinds of impact and interaction they can support. This demonstration covers the key features of Ubi Displays and highlights a selection of real-world case studies that illustrate how the toolkit can be used.