Netbeans - NetBeans IDE 7.0. Develop desktop, mobile and web applications with Java, PHP, C/C++ and more. Runs on Windows, Linux, Mac OS X and Solaris. NetBeans IDE is open-source and free.
PhpMyEdit - PhpMyEdit is an automated PHP code generator and MySQL table editor that provides a platform for the instant table editing.
Eclipse - Eclipse is an open source community, whose projects are focused on building an open development platform comprised of extensible frameworks, tools and runtimes for building, deploying and managing software across the lifecycle.
PhpStorm - Professional IDE for PHP and Web Developers
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
phpDesigner - Powerful PHP IDE and PHP editor with built-in HTML, CSS and JavaScript editor. Fast. Powerful.