ECMerge compares and merges local/FTP/SCC files/folders, side-by-side or 3-way. It provides syntax colouring for many languages, has auto-configured converters for many office and archive format, pretty prints XML. Generate patch/XML/HTML reports.
Zend Studio is the only Integrated Development Environment (IDE) available for professional developers that encompasses all the development components necessary for the full PHP application lifecycle.