NANOWEB, a web server written entirely in PHP
NANOWEB is a http server written entirely in PHP 4.3. It does not need apache or any other server software to work, just the php4 binary.
As commented on the online manual, the installation was really easy with the command line tool handling the task. Though the configuration was a bit tough for me. Not that the configuration syntax, but finding the files was a bit confusing. Though only later on I came to know about the nanoweb-nanoconfig, an ubunty fiesty package which helps configuring nanoweb using a web interface.
Though the feature list is long, the full power can be achieved only in an os where php can provide the POSIX fork() call. I could find this enough for demonstration purposes, but for real heavy work, I still depend on a different application server.