emitter
                                High performance, distributed and low latency publish-subscribe platform.
                            
                        How to download and setup emitter
Open terminal and run command
                                            git clone https://github.com/emitter-io/emitter.git
                                        
                                        git clone is used to create a copy or clone of emitter repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with emitter https://github.com/emitter-io/emitter/archive/master.zip
Or simply clone emitter with SSH
                                            [email protected]:emitter-io/emitter.git