Testing and demonstrating context-aware applications is challenging. Gathering and using ?life? contextual information for these purposes, often requires significant extra development effort. Furthermore, repeating tests and demonstrations of context-aware applications that use ?life? context information, in a controlled way, is difficult or often impossible to achieve. This paper presents a context simulation framework, called SimuContext, which abstracts from the complexity of interfacing with physical context sources and facilitates testing and demonstrating context-aware applications in a controlled way.