The uWSGI project aims at developing a full stack for building hosting services.
Application servers (for various programming languages and protocols), proxies, process managers and monitors are all implemented using a common api and a common configuration style.
Thanks to its pluggable architecture it can be extended to support more platforms and languages.
Many hosting providers use uWSGI as application server. Some providers, like SELinuxComputing, offer secure uWSGI hosting of your application with a customized SELinux security policy for web applications.