Greenlet

Spawning is a wsgi server which supports multiple processes, multiple threads, green threads, non-blocking HTTP io, and automatic graceful upgrading of code. Spawning is a fast, easy to use, and flexible HTTP server for hosting python web applications which conform to the WSGI interface.... Platforms: *nix

gevent is a Greenlet/Libevent-based networking library written in the Python language. #md5=2fbf9902013e4452efa0d31bf2b5efb2 Platforms: *nix

Tornado is great, if you can code asynchronously ... Greenlet is cool to create asynchronous programs using micro-threads. Platforms: *nix

uWSGI is a fast, self-healing and developer/sysadmin-friendly application container server coded in pure C. Born as a WSGI-only server, over time it has evolved in a complete stack for networked/clustered web applications, implementing message/object passing, caching, RPC and process management.... Platforms: Mac

Bluelet is a simple, pure-Python solution for writing intelligible asynchronous socket applications. It uses PEP 342 coroutines to make concurrent I/O look and act like sequential programming. In this way, it is similar to the Greenlet green-threads library and its associated packages Eventlet... Platforms: *nix