Jason is an Open Source interpreter for an extended version of AgentSpeak - a logic-based agent-oriented programming language – written in Java. Jason enables users to build complex multi-agent systems that are capable of operating in environments previously considered too unpredictable for computers to handle. Jason is easily customisable and is suitable for the implementation of reactive planning systems according to the Belief-Desire-Intention (BDI) architecture. This seminar will provide an overview about agent programming in Jason and some glances about recent advances in Jason platform.