PhpStorm -
Enjoy productive PHP and web development with PhpStorm.
Take advantage of deep code understanding, top-notch coding assistance, and support for all major tools and frameworks.
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Whisk -
Tumult Whisk is the lightweight HTML and PHP editor with a live preview pane that displays the updated page as you type. It is an essential app for your web dev toolkit.
Icecoder -
A lightweight yet powerful IDE/code editor that comes in both Web and desktop editions, the latter written with PHP and including choices for several platforms (Windows, Linux, Mac).
Aptana Studio -
Aptana Studio is a complete web development environment that combines powerful authoring tools with a collection of online hosting and collaboration services that help you and your team do more. Includes support for PHP, CSS, FTP, and more...