Simple simeng (simple simulation engine), is a bare bones Java based discrete simulation engine that uses variable time steps. Events are inserted in an ordered queue, and time is advanced based on the time the next event needs to be executed instead of discrete predefined timesteps. Entities can send events directly to other entities (one-2-one), or events can be broadcasted to subscribed entities (one-2-many). The simplicity of the engine makes it suitable for educational purposes.

Frank van Lingen (http://vanlingen.name)