* meinheld
  http://pypi.python.org/pypi/meinheld
  High performance asynchronous Python WSGI Web Server
  http://meinheld.org

* simplehttpd
  An extendable replacement for http.server and its
  SimpleHTTPRequestHandler
  https://github.com/AndrewBC/simplehttpd
  https://pypi.python.org/pypi/simplehttpd

* tornado
  http://www.tornadoweb.org/en/stable/

* waitress
  https://github.com/Pylons/waitress