Apache Friends
XAMPP is an easy to install Apache distribution containing MySQL, PHP and Perl.

Apache Module Development in C
Companion site of a book written by Ken Coar for writing Apache modules.

Apache Module Registry
Resources for module developers and users.

Apache Toolbox
provides a means to easily compile Apache with a variety of options and mods.

Apache Web Server Project
The most popular web server on the net.

ApacheCon US 2001
Santa Clara, California is the latest place to meet up with developers of this popular web server and other projects.

ASF License
The License for the Apache Web Server.

DeveloperSide.NET
A hardened WAMP distribution based on Apache, MySQL, PHP, Perl, Tomcat and OpenSSL.

FAQTs: Apache
Questions and answers regarding Apache installation, configuration and management.

GBdirect
Apache training courses.

htaccess Generator
Generates htpasswd lines for adding to Apache htaccess files.

Indexsoft Access Manager [Commercial]
Perl-based generator of .htpasswd, .htgroups and .htaccess files.

Study and optimization of Web server
French study of improving Apache's speed using PHP caching.

Webmasterworld - Apache Web Server Forum
Apache specific topics.