OMNeT++ is a discrete event simulation environment. OMNeT++ is free (as in free speech) for academic and non-profit use. Its primary application area is the simulation of communication networks, but because of its generic and flexible architecture, it has been successfully used in other areas like the simulation of complex IT systems, queueing networks or hardware architectures as well. OMNeT++ is rapidly becoming a popular simulation platform in the scientific community as well as in industrial settings. The distinguishing factors of OMNeT++ is its strongly component-oriented approach which promotes structured and reusable models, and its extensive GUI support. Due to its modular architecture, the OMNeT++ simulation kernel (and models) can be easily embedded into your applications.