This book contains the proceedings of the Second International Workshop on Languages
Methodologies and Development Tools for Multi-agent Systems (LADS 2009) which took place
during September 7-9 2009 in Turin Italy. As in its 2007 edition this workshop was a part of
MALLOW a federation of workshops on Multi-Agent Logics Languages and Organizations. The LADS
2009 workshop addressed both theoretical and practical issues related to developing and
deploying multi-agent systems. It constituted a rich forum where leading researchers from both
academia and industry could share their experiencesonformalapproaches programminglanguages
methodologies tools andtechniques supporting the developmentanddeploymentof multi-agent
systems.Fromatheoreticalpointofview LADS2009aimedataddressingissues related to theories
methodologies models and approaches that are needed to facilitate the development of
multi-agent systems ensuring their predictability
andveri?cation.Formaldeclarativemodelsandapproacheshavethe potentialof o?ering solutions for
the speci?cation and design of multi-agent systems. From a practical point of view LADS 2009
aimed at stimulating research and d- cussion on how multi-agent system speci?cations and
designs can be e?ectively implemented and tested. This book is the result of a strict selection
and review process. From 14 papers originally submitted to LADS 2009 and after 2 rounds of
reviews we selected 10 high-quality papers covering important topics related to multi-agent
programming technology such as: agent architectures programming languages andmethodologies
socialinteractionmodels developmenttoolsandapplications of multi-agent systems.
