CodeLobster is a free cross-platform IDE for PHP, HTML, CSS, and JavaScript. It supports many interface languages and has a lot of features. It is created for learners and also professional developers in order to give them smart tools to make the development process much easier for them.
The great thing about CodeLobster is that it has plug-ins for Drupal CMS, Joomla CMS, Magento CMS, Smarty template engine, Twig template engine, JQuery library, AngularJS, BackboneJS, Laravel, MeteorJS, Phalcon, CodeIgniter, CakePHP, Symfony, VueJS, Yii and WordPress. I would definitely recommend this IDE, especially if you work with a little bit of PHP and JavaScript. It also has a lot more features that you can benefit from such as highlighting, auto-complete, a powerful PHP debugger, a SQL manager, and more.