Nowadays applications are becoming more and more complex, and multi-agent systems are proven an efficient paradigm for implementing this complexity, especially when self-organisation principles are applied. However, designing such self-organising systems becomes an issue: even if many agent-oriented methodologies are provided for developing multi-agent systems, only a few are interested in helping designers when applying self-organisation and emergence principles. This chapter aims at expounding some of them with a special focus on the more mature one, ADELFE.