www-servers/apache An open-source HTTP server
www-servers/gunicorn gunicorn is a WSGI HTTP Server for UNIX, fast clients and sleepy applications
www-servers/lighttpd Lightweight, fast, secure, compliant, flexible, web-server
www-servers/nginx nginx [engine x] is a HTTP and reverse proxy server, as well as a mail proxy server
www-servers/tomcat-bin Implementation of the Java Servlet and JavaServer Pages technology
www-servers/tomcat-native Allows Tomcat to use native resources for performance, compatibility, etc
www-servers/uwsgi Full stack for building (and hosting) network applications


net Network- and www-related applications and libraries. (core)
CleverCloud Clever Cloud's exherbo repository (third-party)