The talk will give a brief overview the MODAClouds project. The main goal of MODAClouds is to provide methods, a decision support system, an open source IDE and run-time environment for the high-level design, early prototyping, semi-automatic code generation, and automatic deployment of applications on multi-Clouds with guaranteed QoS. MODACLOUDS approach will simplify Cloud provider selection, avoid vendor lock-in problems, provide quality assurance during the application life-cycle, and support migration from Cloud to Cloud when needed.