Derivatives
Apache-SSL, BigApache for Windows, IBM HTTP Server, OpenSA.org: The Open Server Architecture Project, Oracle HTTP Server Powered by Apache, Stronghold Enterprise Apache, StWeb Stratos Web Application Server, WebTen
Graphical User Interfaces
Apache Configuration Editor, ApacheConf, ApacheMon, Covalent Fast Start Server, Mohawk, Zecos Software
Guides and Tutorials
Apache Administrator's Handbook, Apache Cookbook, Apache Desktop Reference, Apache HTTP Server Version 1.3 Documentation, Apache Pocket Reference, Apache Quick Reference Card, Apache Server 2 Bible, 2nd Edition, Apache Server 2.0 A Beginner's Guide, Apache Server 2.0: The Complete Reference, Apache Server FAQ
Modules
Mod Perl, auth_ldap, Chili!Soft ASP [Commercial], DSSI - SSI Extension, FrontPage, Java Apache Project, mod_authn_dbi, mod_autholog_mysql [Commercial], mod_auth_kerb, mod_auth_pam, mod_bandwidth
Platforms
Apache for OS/2, Apache on VMS, Apache Server for OS/2, Apache+SSL Win32 HOWTO, Apache, PHP, and MySQL on Windows 9x, Database Backed Web Application Development, Installing Apache on Windows 98, The Register: Compaq iPaq runs Apache
Apache Friends
XAMPP is an easy to install Apache distribution containing MySQL, PHP and Perl.
Apache GUI-Dev Project
A list of apache graphical user interfaces and other information related to gui configuration tools.
Apache Module Development in C
Companion site of a book written by Ken Coar for writing Apache modules.
Apache Toolbox
provides a means to easily compile Apache with a variety of options and mods.
ApacheCon US 2001
Santa Clara, California is the latest place to meet up with developers of this popular web server and other projects.
FAQTs: Apache
Questions and answers regarding Apache installation, configuration and management.
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.