http://www.apache.org The Apache Software Foundation umbrella site. Access all Apache projects from here.
http://httpd.apache.org The place to start for information on the Apache Web Server. News, downloads, FAQs. Check the Docs subproject for a PDF user's guide.
http://modules.apache.org The Apache Module Registry. Locate modules to install, and contribute modules you've created.
http://www.apachetoday.com A little cluttered and ad ridden, but ServerWatch's Apache Today site is still an excellent source of Apache news and tutorials.
http://tldp.org/HOWTO/HOWTO-INDEX/apps.html#SERVERHTTP An index of web server-related HOWTOs, mostly dealing with Apache, but a few others, too.
http://susefaq.sourceforge.net/faq/apache.html The Unofficial SUSE FAQ list includes useful SUSE-specific Apache information.
http://news.netcraft.com/archives/web_server_survey.html The monthly Netcraft survey of popular web servers. As this is being written, nearly 70 percent of the Web runs on Apache.
http://modpython.org Home of the mod_python Apache module.
http://hoohoo.ncsa.uiuc.edu/cgi/ Information on the common gateway interface.
http://modruby.net The mod_ruby page.
http://www.acme.com/software/thttpd Home of thttpd.
http://caudium.net/ The Caudium WebServer home page.
http://www.xitami.com/ The Xitami website.
http://www.zope.org All the latest and greatest from the Zope community.
http://www.macromedia.com/software/coldfusion/ Web page at Macromedia promoting the ColdFusion MX server.
http://jakarta.apache.org/tomcat/ The Java Servlet and JSP server released through the Apache Free Software Foundation.
