This book constitutes the refereed proceedings of the workshops and special session co-located with the 17th International Conference on Practical Applications of Agents and Multi-Agent Systems, PAAMS 2019, held in Avila, Spain, in June 2019. The total of 26 full and 8 short papers presented in this volume were carefully reviewed and selected from 47 submissions. The book also contains extended abstracts of the doctoral consortium contributions. The papers in this volume stem from the following meetings: Workshop on Agents-Based Solutions for Manufacturing and Supply Chain, AMSC; Second International Workshop on Blockchain Technology for Multi-Agent Systems, BTC4MAS; Workshop on MAS for Complex Networks and Social Computation; CNSC; Workshop on Multi-Agent Based Applications for Energy Markets, Smart Grids and Sustainable Energy Systems, MASGES; Workshop on Smart Cities and Intelligent Agents, SCIA; and Workshop on Swarm Intelligence and Swarm Robotics, SISR; as well as the special session on Software Agents and Virtualization for Internet of Things, SAVIoTS.