Spawn multiple child processes from Ruby and re-spawn those processes if they die. Spawner works on Mac OS X, Linux, Windows, Solaris, AIX -- anywhere that Ruby can run. It is useful for load testing other applications or just keeping things alive. The Spawner class allows the number of child processes to be changed dynamiclly so they can be brought up and down as needed without restarting the spawner. There is also a handy command line spawner app that's really useful for load testing services -- spawn twenty clients and see how things hold up.