Lighttpd - Webserver optimized for speed

Lighttpd powers several popular Web 2.0 sites like YouTube, wikipedia and meebo. Its high speed io-infrastructure allows them to scale several times better with the same hardware than with alternative web-servers. Its features include small memory footprint, FastCGI, Output-Compression, URL-Rewriting and lot more. Its event-driven architecture is optimized for a large number of parallel connections (keep-alive) which is important for high performance AJAX applications.