URL Rewriting
- Beginner's guide to using Apache's mod_rewrite. Includes why redirects are necessary, basic use, and regular expressions.
- http://www.yourhtmlsource.com/sitemanagement/urlrewriting.html

mod_rewrite: URL Rewriting Guide
- A guide to this powerful but complicated module.
- http://www.engelschall.com/pw/apache/rewriteguide/

mod_rewrite: A Beginners Guide
- Covers the basics necessary for rewriting, through the use of examples. Includes how to see if the Apache module is installed, rule structure and how conditions are used.
- http://www.workingwith.me.uk/articles/scripting/mod_rewrite/

Getting Started with Java Servlets using Apache JServ
- Java solution Guide for the Apache mod_jserv module.
- http://www.devshed.com/c/a/Java/Getting-Started-with-Java-Servlets-using-Apache-JServ/

Apache Module Development in C
- Companion site of a book written by Ken Coar for writing Apache modules.
- http://apache-modules.com/

Apache Module Registry
- Resources for module developers and users.
- http://modules.apache.org/

Mod_plsql
- Module for connecting Oracle databases to Web in a way. Compatible with Oracle Application Server. [Open source]
- http://www.selfsoft.com/progs/mod_plsql/

mod_rewrite Reference
- Quick reference to mod_rewrite's configuration directives.
- http://www.apacheref.com/ref/mod_rewrite.html

Apache.org: Module mod_rewrite URL Rewriting Engine
- Rewrites the requested URL on-the-fly based on configuration directives and rules.
- http://httpd.apache.org/docs/mod/mod_rewrite.html

Java Apache Project
- Java for the Apache Web Server. This archive is maintained purely for historic purposes. The Java Apache Project ceased its development in 1999 and all codebases were moved or superseeded by those found at the Apache Jakarta Project or Apache XML Proje
- http://archive.apache.org/dist/java/

mod_mono
- Apache 2 module that embeds Mono and allows you to run ASP.NET pages in Linux and Unix.
- http://www.apacheworld.org/modmono/

mod_gzip
- speeds up load-time of Web sites by compressing HTML pages on-the-fly.
- http://www.schroepl.net/projekte/mod_gzip/

mod_security
- Open source intrusion detection and prevention engine for Apache.
- http://www.modsecurity.org/

RexxTags
- A Rexx Server Pages (RSP) compiler, suitable for rapid prototyping of XML tags in REXX and for deployment in small-to-medium sized web sites. Requires mod_rexx.
- http://www.rexxtags.org/

Robotcop
- Helps webmasters prevent spiders from accessing the parts of sites they have marked off limits using the robots.txt file.
- http://www.robotcop.org/

mod_auth_kerb
- Provides Kerberos user authentication.
- http://modauthkerb.sourceforge.net

mod_gunzip
- Lets Apache decompress gzipped files before serving them to browsers that cannot.
- http://www.innerjoin.org/apache-compression/howto.html

mod_ruby
- Embeds the Ruby interpreter into the Apache web server, allowing Ruby CGI scripts to be executed natively.
- http://www.modruby.net/

mod_bandwidth
- enable the setting of server-wide or per connection bandwidth limits, based on the directory, size of files and remote IP/domain.
- http://www.cohprog.com/mod_bandwidth.html

FrontPage
- Microsoft FrontPage for Apache and other Web Servers.
- http://www.rtr.com/fpsupport/

Chili!Soft ASP [Commercial]
- Active Server Pages module for Apache.
- http://www.chilisoft.com/chiliasp/

Pluggable authentication for Apache
- Features mod_auth_pam, a module for pluggable authentication (PAM).
- http://pam.sourceforge.net/mod_auth_pam/

mod_dav
- Apache module to provide DAV capabilities (RFC 2518) for your Apache web server. It is an Open Source module, provided under an Apache-style license.
- http://www.webdav.org/mod_dav/

Nona's mod_auth_ldap
- Apache module for authenticating users against LDAP directories.
- http://nona.net/software/ldap/

mod_cntr
- Counts and displays page hits.
- http://www.dan.co.jp/webcounter/

mod_ssl
- Apache Interface to OpenSSL
- http://www.modssl.org/

auth_ldap
- Provides LDAP authentication.
- http://www.rudedog.org/auth_ldap/