Web servers

Abyss - http://abyss.sourceforge.net/

Aprelium Abyss - http://www.aprelium.com/

Apache - http://httpd.apache.org/

Sambar - http://www.sambar.com/

Savant - http://savant.sourceforge.net/

TinyWeb - http://www.ritlabs.com/tinyweb/index.html