Geany - Lightweight IDE for Linux and Windows
Kodiak PHP - Kodiak PHP can run any PHP code directly (offline) on your iPad, no need for an internet connection.
BlueGriffon - An HTML editor based on Mozilla rendering engine.
Coder - The Cloud IDE, Solved
Adobe Dreamweaver - Adobe Dreamweaver is a proprietary web development tool developed by Adobe Systems.
NuSphere PhpEd - PhpED - PHP IDE integrated development environment for developing web sites using PHP, HTML, Perl, JScript and CSS that combines a comfortable editor, debugger, profiler with the MySQl, PostrgeSQL database support based on easy wizards and tutorials.