ICWE 2016 Rapid Mashup Challenge: Introduction.- FlexMash 2.0 -- Flexible Modeling and Execution of Data Mashups.- The SmartComposition Approach for Creating Environment-Aware Multi-Screen Mashups.- Linked Widgets Platform for Rapid Collaborative Semantic Mashup Development.- End-User Development for the Internet of Things: EFESTO and the 5W composition paradigm.- Toolet: an editor for Web-based tool appropriation by hobby programmers.- On the Role of Context in the Design of Mobile Mashups.- Challenge Outcome and Conclusion.