MAS does not success as they should regarding to their potentiality. One reason is that designing a MAS (distributed system, high level language, TODO ...) is a more complex task than designing a TODO [kind of] system (single threaded, TODO : ...) ; the gap between these systems requires more skills. Before more people should be ready to handle this complexity, there is a need to improve the offer of tools. The diversity of MAS approaches, even if it is a richness, has lead to make difficult to reuse advances made by an approach in another approach.