nginx（发音同 engine x）是一款轻量级的Web 服务器／反向代理服务器及电子邮件（IMAP/POP3）代理服务器，并在一个BSD-like 协议下发行。由俄罗斯的程序设计师Igor Sysoev所开发，最初供俄国大型的入口网站及搜寻引擎Rambler（俄文：Рамблер）使用。  其特点是占有内存少，并发能力强，事实上nginx的并发能力确实在同类型的网页伺服器中表现较好.
目前中国大陆使用nginx网站用户有：新浪、网易、腾讯,另外知名的微网志Plurk也使用nginx。Changes with nginx 0.9.2 06 Dec 2010

*) Feature: the "If-Unmodified-Since" client request header line
support.

*) Workaround: fallback to accept() syscall if accept4() was not
implemented; the issue had appeared in 0.9.0.

*) Bugfix: nginx could not be built on Cygwin; the issue had appeared
in 0.9.0.

*) Bugfix: for OpenSSL vulnerability CVE-2010-4180.
Thanks to Maxim Dounin.

下载地址:
Windows:http://nginx.org/download/nginx-0.9.2.zip
Linux:http://nginx.org/download/nginx-0.9.2.tar.gz