Komodo Edit – General purpose scripting language editor with support for PHP. Free version of the commercial ActiveState Komodo IDE.
Komodo IDE – Cross-platform integrated development environment for PHP as well as Python, Ruby and Perl.
Netbeans – A dedicated PHP coding environment and complete integration with web standards. Supports SFTP and FTP. Full support for SVN and Git since 7.2 and powerful plugin support for added functionality.
NoteTab – Broad editor, allows you to have multiple tabs open for different files, has FTP support, comes in two trial versions (NoteTab Standard, NoteTab Pro) and one free version NoteTab Light. NoteTab Pro highlights tags.
UltraEdit – Supports SFTP and FTP; Trial available
Zend Studio – Supports SFTP and FTP (Eclipse with Zend's commercial plug-in)