Trust and Reputation -- Optimizing an Incentives’ Mechanism for Truthful Feedback in Virtual Communities -- A New View on Normativeness in Distributed Reputation Systems -- A Trust Management Scheme in Structured P2P Systems -- Incentive-Compatibility in a Distributed Autonomous Currency System -- Handling Free Riders in Peer-to-Peer Systems -- P2P Infrastructure -- Highly Available DHTs: Keeping Data Consistency After Updates -- Caching Indices for Efficient Lookup in Structured Overlay Networks -- Semantic Infrastructure -- A Semantic Marketplace of Negotiating Agents -- Semantic Web Service Composition Through a P2P-Based Multi-agent Environment -- Community and Mobile Applications -- A Low-Latency Peer-to-Peer Approach for Massively Multiplayer Games -- An Agent-Based Collaborative Framework for Mobile P2P Applications -- ACP2P: Agent-Community-Based Peer-to-Peer Information Retrieval – An Evaluation -- A Peer Ubiquitous Multi-agent Framework for Providing Nomadic Users with Adapted Information.