There is a long history of using disaggregated micro models for assisting with structure and calibration of  more highly aggregated SD models. We present a new integrated development environment which combines SD, Agent Based and Discrete Event simulation using the java Eclipse framework, which allows powerful software extensions, including GIS datasets and optimization, and compelling and engaging animations across multiple Mac and PC platforms. This interactive workshop will use mostly health examples to illustrate the features, including epidemics, diffusion of innovation, “across the skin” modeling, population dynamics, and chronic illness morbidity and disability, dynamic decision-making and adaptive supply chains.