nginx has proven itself to be a pretty stable webserver for both proxying and static file serving. It's really useful to put your Apache process behind because

nginx has proven itself to be a pretty stable webserver for both proxying and static file serving. It's really useful to put your Apache process behind because you get the advantage of lightweight keep-alive for static content as well as the fact that the proxy keeps Apache from being overloaded. Really nice. I don't know as much about the other two, but they seem somewhat Erlang-centric. Which isn't a bad thing, but makes them less useful for me.