Content management, blogs, and online forums are among the most significant online trends today, and Drupal, phpBB, and WordPress are three of the most popular open source applications facilitating these trends.

Drupal is a full content management system that allows you to create any type of website you desire, from an e-commerce to a community-based site. phpBB enables you to set up a bulletin board or forum. And WordPress is the software of choice for the exploding blog community. All three technologies are based on PHP and MySQL.

Building Online Communities with Drupal,...