The purpose of this document is to give an overview of the Apache web server and related projects. Apache is the most popular server on the Internet. New Apache users, specially those coming from a Windows background, are often unaware of the possibilities of Apache, useful addons and how everything works together. This document aims to show a general picture of such possibilities with a brief description of each one and pointers for further information. The information has been gathered from many sources, including projects' web pages, conference talks, mailing lists, Apache websites and my own hands-on experience. Full credit is given to these authors. Without them and their work this document would not have been possible or necessary.
Disclaimer: I work for Covalent. We provide products and support services for the Apache webserver, and I mention some of them here, as I do for our competitors and similar open source projects.