Zend Studio is described as 'For Eclipse combines proven capabilities to create the world’s most powerful IDE for Rich Internet Applications (RIAs). Studio's powerful developer tools combined with Adobe Flex Builder and integration with Zend Framework lets developers build RIAs faster and' and is a Code Editor in the development category. There are more than 25 alternatives to Zend Studio for a variety of platforms, including Windows, Mac, Linux, BSD and iPad apps. The best Zend Studio alternative is Microsoft Visual Studio. It's not free, so if you're looking for a free alternative, you could try Microsoft Visual Studio or Eclipse. Other great apps like Zend Studio are PhpStorm, Aptana Studio, Qt Creator and Xcode.