LEAP (Lightweight Extensible Agent Platform (IST-1999-10211)) is a development and run-time environment for Intelligent Agents, is the precursor of the second generation of FIPA compliant platforms. It represents a major technical challenge - it aims to become the first integrated agent development environment capable of generating agent applications in the ZEUS environment and executing them on run-time environments derived from JADE, implemented over a large family of devices (computers, PDA and mobile phones…) and communication mechanisms (TCP/IP, WAP…). In this way LEAP benefits from the advanced design-time features of Zeus and the lightweight and extensible properties of JADE.