lighttpd (pronounced "lighty") is a performance-optimized open-source web server
lighttpd supports the fastcgi, scgi and cgi interfaces to external programs, permitting web applications written in any programming language to be used with the server. it powers several popular Web 2.0 sites like YouTube, wikipedia and meebo.
Links
- Homepage: http://www.lighttpd.net
- Wikipedia: http://en.wikipedia.org/wiki/Lighttpd