Agent.GUI is a simulation framework and toolkit based on the JADE framework. It provides functionalities for time aspects, agent-environment interaction, visualization and load balancing, Furthermore, the included application focuses the usability for end users. It addresses the utilization of Multi-Agent systems (MAS) and Multi-Agent based simulations (MABS) for end users of different domains than computer science. As the suffix of the name indicates, Agent.GUI provides a predefined Graphical User Interface which can be extended by developers in order to address the needs of engineers, economists or (of course) computer specialists.