Wikipedia
Codelobster
Codelobster is a portable integrated development environment (IDE) primarily for PHP, which also supports HTML, CSS, and JavaScript development. Plug-ins are available for Drupal, WordPress, Smarty, Joomla, JQuery, Facebook, Codeigniter, Yii, and CakePHP. Free registration by email is required after 30 days of use of the program, and there is a 25 dollar license fee. The program is missing a help system as of its latest version.
The program features syntax highlighting and auto-completion for SQL, PHP, HTML, CSS, JavaScript, and XML, as well as automatic syntax checking. There is a HTML and CSS inspector like Firebug. It also includes Drupal support. All plugins are paid, but they offer trial periods of varying length.