UWsgi

The uWSGI project aims at developing a full stack for building (and hosting) clustered/distributed network applications. Mainly targeted at the web and its standards, it has been successfully used in a lot of different contexts. Thanks to its pluggable architecture it can be extended without limits to support more platforms and languages. Currently, you can write plugins in C, C++ and Objective-C. The "WSGI" part in the name is a tribute to the namesake Python standard, as it has been the first developed plugin for the project.

So essentially it's a production-quality WSGI server, so it's what you run your Python Web Framework apps with, instead of the lite/dev server that's part of the framework itself. And you generally run it behind something like NginX (that's what I use).

https://github.com/unbit/uwsgi-docs#readme

http://uwsgi-docs.readthedocs.org/en/latest/

https://github.com/csinchok/exploring-uwsgi

http://stackoverflow.com/questions/13210636/differentiate-nginx-haproxy-varnish-and-uwsgi-gunicorn

I'm using it with WebPy - 2012-10-16-SettingUpHostingForSimplestThing