ErlangTW is a parallel/distributed simulation middleware based on the Time Warp synchronization protocol. ErlangTW is entirely written in Erlang, a concurrent, functional programming language specifically targeted at building distributed systems.
Go-Warp is a simulator based on the Time Warp synchronization algorithm and implemented using the Go programming language.
The Large Unstructured NEtwork Simulator (LUNES) is an efficient and easy-to-use tool for the simulation of complex protocols on top of large graphs.